Merge branch 'pks-find-tag-error' into 'master'

proto: Introduce FindTagError to distinguish non-existent tags

See merge request gitlab-org/gitaly!4767

12 files changed, 1278 insertions, 1070 deletions

diff --git a/internal/gitaly/service/ref/find_tag.go b/internal/gitaly/service/ref/find_tag.go
new file mode 100644
index 000000000..5c92d5cbf
--- /dev/null
+++ b/internal/gitaly/service/ref/find_tag.go
@@ -0,0 +1,122 @@
+package ref
+
+import (
+	"bufio"
+	"context"
+	"errors"
+	"fmt"
+	"strings"
+
+	"gitlab.com/gitlab-org/gitaly/v15/internal/git"
+	"gitlab.com/gitlab-org/gitaly/v15/internal/git/catfile"
+	"gitlab.com/gitlab-org/gitaly/v15/internal/helper"
+	"gitlab.com/gitlab-org/gitaly/v15/proto/go/gitalypb"
+)
+
+func (s *server) FindTag(ctx context.Context, in *gitalypb.FindTagRequest) (*gitalypb.FindTagResponse, error) {
+	if err := s.validateFindTagRequest(in); err != nil {
+		return nil, helper.ErrInvalidArgument(err)
+	}
+
+	repo := s.localrepo(in.GetRepository())
+
+	tag, err := s.findTag(ctx, repo, in.GetTagName())
+	if err != nil {
+		return nil, helper.ErrInternal(err)
+	}
+
+	return &gitalypb.FindTagResponse{Tag: tag}, nil
+}
+
+// parseTagLine parses a line of text with the output format %(objectname) %(objecttype) %(refname:lstrip=2)
+func parseTagLine(ctx context.Context, objectReader catfile.ObjectReader, tagLine string) (*gitalypb.Tag, error) {
+	fields := strings.SplitN(tagLine, " ", 3)
+	if len(fields) != 3 {
+		return nil, fmt.Errorf("invalid output from for-each-ref command: %v", tagLine)
+	}
+
+	tagID, refType, refName := fields[0], fields[1], fields[2]
+
+	tag := &gitalypb.Tag{
+		Id:   tagID,
+		Name: []byte(refName),
+	}
+
+	switch refType {
+	// annotated tag
+	case "tag":
+		tag, err := catfile.GetTag(ctx, objectReader, git.Revision(tagID), refName)
+		if err != nil {
+			return nil, fmt.Errorf("getting annotated tag: %v", err)
+		}
+		catfile.TrimTagMessage(tag)
+
+		return tag, nil
+	case "commit":
+		commit, err := catfile.GetCommit(ctx, objectReader, git.Revision(tagID))
+		if err != nil {
+			return nil, fmt.Errorf("getting commit catfile: %v", err)
+		}
+		tag.TargetCommit = commit
+		return tag, nil
+	default:
+		return tag, nil
+	}
+}
+
+func (s *server) findTag(ctx context.Context, repo git.RepositoryExecutor, tagName []byte) (*gitalypb.Tag, error) {
+	tagCmd, err := repo.Exec(ctx,
+		git.SubCmd{
+			Name: "tag",
+			Flags: []git.Option{
+				git.Flag{Name: "-l"}, git.ValueFlag{Name: "--format", Value: tagFormat},
+			},
+			Args: []string{string(tagName)},
+		},
+		git.WithRefTxHook(repo),
+	)
+	if err != nil {
+		return nil, fmt.Errorf("for-each-ref error: %v", err)
+	}
+
+	objectReader, cancel, err := s.catfileCache.ObjectReader(ctx, repo)
+	if err != nil {
+		return nil, err
+	}
+	defer cancel()
+
+	var tag *gitalypb.Tag
+
+	scanner := bufio.NewScanner(tagCmd)
+	if scanner.Scan() {
+		tag, err = parseTagLine(ctx, objectReader, scanner.Text())
+		if err != nil {
+			return nil, err
+		}
+	} else {
+		// TODO: this callsite will eventually be converted to return a FindTagError with
+		// `TagNotFound` set.
+		return nil, errors.New("no tag found")
+	}
+
+	if err = tagCmd.Wait(); err != nil {
+		return nil, err
+	}
+
+	return tag, nil
+}
+
+func (s *server) validateFindTagRequest(in *gitalypb.FindTagRequest) error {
+	if in.GetRepository() == nil {
+		return errors.New("repository is empty")
+	}
+
+	if _, err := s.locator.GetRepoPath(in.GetRepository()); err != nil {
+		return fmt.Errorf("invalid git directory: %v", err)
+	}
+
+	if in.GetTagName() == nil {
+		return errors.New("tag name is empty")
+	}
+	return nil
+}
diff --git a/internal/gitaly/service/ref/find_tag_test.go b/internal/gitaly/service/ref/find_tag_test.go
new file mode 100644
index 000000000..6461e9e77
--- /dev/null
+++ b/internal/gitaly/service/ref/find_tag_test.go
@@ -0,0 +1,324 @@
+//go:build !gitaly_test_sha256
+
+package ref
+
+import (
+	"fmt"
+	"strings"
+	"testing"
+
+	"github.com/stretchr/testify/require"
+	"gitlab.com/gitlab-org/gitaly/v15/internal/git"
+	"gitlab.com/gitlab-org/gitaly/v15/internal/git/catfile"
+	"gitlab.com/gitlab-org/gitaly/v15/internal/git/gittest"
+	"gitlab.com/gitlab-org/gitaly/v15/internal/git/localrepo"
+	"gitlab.com/gitlab-org/gitaly/v15/internal/git/updateref"
+	"gitlab.com/gitlab-org/gitaly/v15/internal/helper"
+	"gitlab.com/gitlab-org/gitaly/v15/internal/testhelper"
+	"gitlab.com/gitlab-org/gitaly/v15/proto/go/gitalypb"
+	"google.golang.org/grpc/codes"
+	"google.golang.org/protobuf/types/known/timestamppb"
+)
+
+func TestFindTag_successful(t *testing.T) {
+	t.Parallel()
+
+	ctx := testhelper.Context(t)
+	cfg, repoProto, repoPath, client := setupRefService(ctx, t)
+
+	repo := localrepo.NewTestRepo(t, cfg, repoProto)
+
+	blobID := git.ObjectID("faaf198af3a36dbf41961466703cc1d47c61d051")
+	commitID := git.ObjectID("6f6d7e7ed97bb5f0054f2b1df789b39ca89b6ff9")
+
+	gitCommit := testhelper.GitLabTestCommit(commitID.String())
+
+	bigCommitID := gittest.WriteCommit(t, cfg, repoPath,
+		gittest.WithBranch("local-big-commits"),
+		gittest.WithMessage("An empty commit with REALLY BIG message\n\n"+strings.Repeat("a", helper.MaxCommitOrTagMessageSize+1)),
+		gittest.WithParents("60ecb67744cb56576c30214ff52294f8ce2def98"),
+	)
+	bigCommit, err := repo.ReadCommit(ctx, git.Revision(bigCommitID))
+	require.NoError(t, err)
+
+	annotatedTagID := gittest.WriteTag(t, cfg, repoPath, "v1.2.0", blobID.Revision(), gittest.WriteTagConfig{Message: "Blob tag"})
+
+	gittest.WriteTag(t, cfg, repoPath, "v1.3.0", commitID.Revision())
+	gittest.WriteTag(t, cfg, repoPath, "v1.4.0", blobID.Revision())
+
+	// To test recursive resolving to a commit
+	gittest.WriteTag(t, cfg, repoPath, "v1.5.0", "v1.3.0")
+
+	// A tag to commit with a big message
+	gittest.WriteTag(t, cfg, repoPath, "v1.6.0", bigCommitID.Revision())
+
+	// A tag with a big message
+	bigMessage := strings.Repeat("a", 11*1024)
+	bigMessageTag1ID := gittest.WriteTag(t, cfg, repoPath, "v1.7.0", commitID.Revision(), gittest.WriteTagConfig{Message: bigMessage})
+
+	// A tag with a commit id as its name
+	commitTagID := gittest.WriteTag(t, cfg, repoPath, commitID.String(), commitID.Revision(), gittest.WriteTagConfig{Message: "commit tag with a commit sha as the name"})
+
+	// a tag of a tag
+	tagOfTagID := gittest.WriteTag(t, cfg, repoPath, "tag-of-tag", commitTagID.Revision(), gittest.WriteTagConfig{Message: "tag of a tag"})
+
+	expectedTags := []*gitalypb.Tag{
+		{
+			Name:         []byte(commitID),
+			Id:           commitTagID.String(),
+			TargetCommit: gitCommit,
+			Message:      []byte("commit tag with a commit sha as the name"),
+			MessageSize:  40,
+			Tagger: &gitalypb.CommitAuthor{
+				Name:     []byte(gittest.DefaultCommitterName),
+				Email:    []byte(gittest.DefaultCommitterMail),
+				Date:     timestamppb.New(gittest.DefaultCommitTime),
+				Timezone: []byte("+0100"),
+			},
+		},
+		{
+			Name:         []byte("tag-of-tag"),
+			Id:           tagOfTagID.String(),
+			TargetCommit: gitCommit,
+			Message:      []byte("tag of a tag"),
+			MessageSize:  12,
+			Tagger: &gitalypb.CommitAuthor{
+				Name:     []byte(gittest.DefaultCommitterName),
+				Email:    []byte(gittest.DefaultCommitterMail),
+				Date:     timestamppb.New(gittest.DefaultCommitTime),
+				Timezone: []byte("+0100"),
+			},
+		},
+		{
+			Name:         []byte("v1.0.0"),
+			Id:           "f4e6814c3e4e7a0de82a9e7cd20c626cc963a2f8",
+			TargetCommit: gitCommit,
+			Message:      []byte("Release"),
+			MessageSize:  7,
+			Tagger: &gitalypb.CommitAuthor{
+				Name:     []byte("Dmitriy Zaporozhets"),
+				Email:    []byte("dmitriy.zaporozhets@gmail.com"),
+				Date:     &timestamppb.Timestamp{Seconds: 1393491299},
+				Timezone: []byte("+0200"),
+			},
+			SignatureType: gitalypb.SignatureType_NONE,
+		},
+		{
+			Name:         []byte("v1.1.0"),
+			Id:           "8a2a6eb295bb170b34c24c76c49ed0e9b2eaf34b",
+			TargetCommit: testhelper.GitLabTestCommit("5937ac0a7beb003549fc5fd26fc247adbce4a52e"),
+			Message:      []byte("Version 1.1.0"),
+			MessageSize:  13,
+			Tagger: &gitalypb.CommitAuthor{
+				Name:     []byte("Dmitriy Zaporozhets"),
+				Email:    []byte("dmitriy.zaporozhets@gmail.com"),
+				Date:     &timestamppb.Timestamp{Seconds: 1393505709},
+				Timezone: []byte("+0200"),
+			},
+		},
+		{
+			Name:         []byte("v1.1.1"),
+			Id:           "8f03acbcd11c53d9c9468078f32a2622005a4841",
+			TargetCommit: testhelper.GitLabTestCommit("189a6c924013fc3fe40d6f1ec1dc20214183bc97"),
+			Message:      []byte("x509 signed tag\n-----BEGIN SIGNED MESSAGE-----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\nSDH1i0K32NyFbnh0BSos7njq7ELqKlYBsoB/sZfaH2vKy5U=\n-----END SIGNED MESSAGE-----"),
+			MessageSize:  6494,
+			Tagger: &gitalypb.CommitAuthor{
+				Name:     []byte("Roger Meier"),
+				Email:    []byte("r.meier@siemens.com"),
+				Date:     &timestamppb.Timestamp{Seconds: 1574261780},
+				Timezone: []byte("+0100"),
+			},
+			SignatureType: gitalypb.SignatureType_X509,
+		},
+		{
+			Name:        []byte("v1.2.0"),
+			Id:          annotatedTagID.String(),
+			Message:     []byte("Blob tag"),
+			MessageSize: 8,
+			Tagger: &gitalypb.CommitAuthor{
+				Name:     []byte(gittest.DefaultCommitterName),
+				Email:    []byte(gittest.DefaultCommitterMail),
+				Date:     timestamppb.New(gittest.DefaultCommitTime),
+				Timezone: []byte("+0100"),
+			},
+		},
+		{
+			Name:         []byte("v1.3.0"),
+			Id:           commitID.String(),
+			TargetCommit: gitCommit,
+		},
+		{
+			Name: []byte("v1.4.0"),
+			Id:   blobID.String(),
+		},
+		{
+			Name:         []byte("v1.5.0"),
+			Id:           commitID.String(),
+			TargetCommit: gitCommit,
+		},
+		{
+			Name:         []byte("v1.6.0"),
+			Id:           bigCommitID.String(),
+			TargetCommit: bigCommit,
+		},
+		{
+			Name:         []byte("v1.7.0"),
+			Id:           bigMessageTag1ID.String(),
+			Message:      []byte(bigMessage[:helper.MaxCommitOrTagMessageSize]),
+			MessageSize:  int64(len(bigMessage)),
+			TargetCommit: gitCommit,
+			Tagger: &gitalypb.CommitAuthor{
+				Name:     []byte(gittest.DefaultCommitterName),
+				Email:    []byte(gittest.DefaultCommitterMail),
+				Date:     timestamppb.New(gittest.DefaultCommitTime),
+				Timezone: []byte("+0100"),
+			},
+		},
+	}
+
+	for _, expectedTag := range expectedTags {
+		rpcRequest := &gitalypb.FindTagRequest{Repository: repoProto, TagName: expectedTag.Name}
+
+		resp, err := client.FindTag(ctx, rpcRequest)
+		require.NoError(t, err)
+
+		testhelper.ProtoEqual(t, expectedTag, resp.GetTag())
+	}
+}
+
+func TestFindTag_nestedTag(t *testing.T) {
+	t.Parallel()
+
+	ctx := testhelper.Context(t)
+	cfg, repoProto, repoPath, client := setupRefService(ctx, t)
+
+	repo := localrepo.NewTestRepo(t, cfg, repoProto)
+
+	blobID := git.ObjectID("faaf198af3a36dbf41961466703cc1d47c61d051")
+	commitID := git.ObjectID("6f6d7e7ed97bb5f0054f2b1df789b39ca89b6ff9")
+
+	testCases := []struct {
+		description string
+		depth       int
+		originalOid git.ObjectID
+	}{
+		{
+			description: "nested 1 deep, points to a commit",
+			depth:       1,
+			originalOid: commitID,
+		},
+		{
+			description: "nested 4 deep, points to a commit",
+			depth:       4,
+			originalOid: commitID,
+		},
+		{
+			description: "nested 3 deep, points to a blob",
+			depth:       3,
+			originalOid: blobID,
+		},
+		{
+			description: "nested 20 deep, points to a commit",
+			depth:       20,
+			originalOid: commitID,
+		},
+	}
+
+	for _, tc := range testCases {
+		t.Run(tc.description, func(t *testing.T) {
+			tags, err := repo.GetReferences(ctx, "refs/tags/")
+			require.NoError(t, err)
+
+			updater, err := updateref.New(ctx, repo)
+			require.NoError(t, err)
+			for _, tag := range tags {
+				require.NoError(t, updater.Delete(tag.Name))
+			}
+			require.NoError(t, updater.Commit())
+
+			catfileCache := catfile.NewCache(cfg)
+			defer catfileCache.Stop()
+
+			objectReader, cancel, err := catfileCache.ObjectReader(ctx, repo)
+			require.NoError(t, err)
+			defer cancel()
+
+			objectInfoReader, cancel, err := catfileCache.ObjectInfoReader(ctx, repo)
+			require.NoError(t, err)
+			defer cancel()
+
+			info, err := objectInfoReader.Info(ctx, git.Revision(tc.originalOid))
+			require.NoError(t, err)
+
+			tagID := tc.originalOid
+			var tagName, tagMessage string
+
+			for depth := 0; depth < tc.depth; depth++ {
+				tagName = fmt.Sprintf("tag-depth-%d", depth)
+				tagMessage = fmt.Sprintf("a commit %d deep", depth)
+				tagID = gittest.WriteTag(t, cfg, repoPath, tagName, tagID.Revision(), gittest.WriteTagConfig{Message: tagMessage})
+			}
+			expectedTag := &gitalypb.Tag{
+				Name:        []byte(tagName),
+				Id:          tagID.String(),
+				Message:     []byte(tagMessage),
+				MessageSize: int64(len([]byte(tagMessage))),
+				Tagger: &gitalypb.CommitAuthor{
+					Name:     []byte(gittest.DefaultCommitterName),
+					Email:    []byte(gittest.DefaultCommitterMail),
+					Date:     timestamppb.New(gittest.DefaultCommitTime),
+					Timezone: []byte("+0100"),
+				},
+			}
+			if info.Type == "commit" {
+				commit, err := catfile.GetCommit(ctx, objectReader, git.Revision(tc.originalOid))
+				require.NoError(t, err)
+				expectedTag.TargetCommit = commit
+			}
+			rpcRequest := &gitalypb.FindTagRequest{Repository: repoProto, TagName: []byte(tagName)}
+
+			resp, err := client.FindTag(ctx, rpcRequest)
+			require.NoError(t, err)
+			require.Equal(t, expectedTag, resp.GetTag())
+		})
+	}
+}
+
+func TestFindTag_invalidRequest(t *testing.T) {
+	t.Parallel()
+
+	ctx := testhelper.Context(t)
+	_, repo, _, client := setupRefService(ctx, t)
+
+	testCases := []struct {
+		desc    string
+		request *gitalypb.FindTagRequest
+	}{
+		{
+			desc:    "empty request",
+			request: &gitalypb.FindTagRequest{},
+		},
+		{
+			desc: "invalid repo",
+			request: &gitalypb.FindTagRequest{
+				Repository: &gitalypb.Repository{
+					StorageName:  "fake",
+					RelativePath: "repo",
+				},
+			},
+		},
+		{
+			desc: "empty tag name",
+			request: &gitalypb.FindTagRequest{
+				Repository: repo,
+			},
+		},
+	}
+
+	for _, tc := range testCases {
+		t.Run(tc.desc, func(t *testing.T) {
+			_, err := client.FindTag(ctx, tc.request)
+			testhelper.RequireGrpcCode(t, err, codes.InvalidArgument)
+		})
+	}
+}
diff --git a/internal/gitaly/service/ref/refs.go b/internal/gitaly/service/ref/refs.go
index 998415e6d..0e1f13eb6 100644
--- a/internal/gitaly/service/ref/refs.go
+++ b/internal/gitaly/service/ref/refs.go
@@ -1,16 +1,13 @@
 package ref
 
 import (
-	"bufio"
 	"bytes"
 	"context"
-	"errors"
 	"fmt"
 	"math"
 	"strings"
 
 	"gitlab.com/gitlab-org/gitaly/v15/internal/git"
-	"gitlab.com/gitlab-org/gitaly/v15/internal/git/catfile"
 	"gitlab.com/gitlab-org/gitaly/v15/internal/helper"
 	"gitlab.com/gitlab-org/gitaly/v15/internal/helper/lines"
 	"gitlab.com/gitlab-org/gitaly/v15/proto/go/gitalypb"
@@ -175,112 +172,6 @@ func (s *server) findAllBranches(in *gitalypb.FindAllBranchesRequest, stream git
 	return s.findRefs(ctx, writer, repo, patterns, opts)
 }
 
-func (s *server) FindTag(ctx context.Context, in *gitalypb.FindTagRequest) (*gitalypb.FindTagResponse, error) {
-	if err := s.validateFindTagRequest(in); err != nil {
-		return nil, helper.ErrInvalidArgument(err)
-	}
-
-	repo := s.localrepo(in.GetRepository())
-
-	tag, err := s.findTag(ctx, repo, in.GetTagName())
-	if err != nil {
-		return nil, helper.ErrInternal(err)
-	}
-
-	return &gitalypb.FindTagResponse{Tag: tag}, nil
-}
-
-// parseTagLine parses a line of text with the output format %(objectname) %(objecttype) %(refname:lstrip=2)
-func parseTagLine(ctx context.Context, objectReader catfile.ObjectReader, tagLine string) (*gitalypb.Tag, error) {
-	fields := strings.SplitN(tagLine, " ", 3)
-	if len(fields) != 3 {
-		return nil, fmt.Errorf("invalid output from for-each-ref command: %v", tagLine)
-	}
-
-	tagID, refType, refName := fields[0], fields[1], fields[2]
-
-	tag := &gitalypb.Tag{
-		Id:   tagID,
-		Name: []byte(refName),
-	}
-
-	switch refType {
-	// annotated tag
-	case "tag":
-		tag, err := catfile.GetTag(ctx, objectReader, git.Revision(tagID), refName)
-		if err != nil {
-			return nil, fmt.Errorf("getting annotated tag: %v", err)
-		}
-		catfile.TrimTagMessage(tag)
-
-		return tag, nil
-	case "commit":
-		commit, err := catfile.GetCommit(ctx, objectReader, git.Revision(tagID))
-		if err != nil {
-			return nil, fmt.Errorf("getting commit catfile: %v", err)
-		}
-		tag.TargetCommit = commit
-		return tag, nil
-	default:
-		return tag, nil
-	}
-}
-
-func (s *server) findTag(ctx context.Context, repo git.RepositoryExecutor, tagName []byte) (*gitalypb.Tag, error) {
-	tagCmd, err := repo.Exec(ctx,
-		git.SubCmd{
-			Name: "tag",
-			Flags: []git.Option{
-				git.Flag{Name: "-l"}, git.ValueFlag{Name: "--format", Value: tagFormat},
-			},
-			Args: []string{string(tagName)},
-		},
-		git.WithRefTxHook(repo),
-	)
-	if err != nil {
-		return nil, fmt.Errorf("for-each-ref error: %v", err)
-	}
-
-	objectReader, cancel, err := s.catfileCache.ObjectReader(ctx, repo)
-	if err != nil {
-		return nil, err
-	}
-	defer cancel()
-
-	var tag *gitalypb.Tag
-
-	scanner := bufio.NewScanner(tagCmd)
-	if scanner.Scan() {
-		tag, err = parseTagLine(ctx, objectReader, scanner.Text())
-		if err != nil {
-			return nil, err
-		}
-	} else {
-		return nil, errors.New("no tag found")
-	}
-
-	if err = tagCmd.Wait(); err != nil {
-		return nil, err
-	}
-
-	return tag, nil
-}
-
-func (s *server) validateFindTagRequest(in *gitalypb.FindTagRequest) error {
-	if in.GetRepository() == nil {
-		return errors.New("repository is empty")
-	}
-
-	if _, err := s.locator.GetRepoPath(in.GetRepository()); err != nil {
-		return fmt.Errorf("invalid git directory: %v", err)
-	}
-
-	if in.GetTagName() == nil {
-		return errors.New("tag name is empty")
-	}
-	return nil
-}
-
 func buildPaginationOpts(ctx context.Context, p *gitalypb.PaginationParameter) *paginationOpts {
 	opts := &paginationOpts{}
 	opts.IsPageToken = func(_ []byte) bool { return true }
diff --git a/internal/gitaly/service/ref/refs_test.go b/internal/gitaly/service/ref/refs_test.go
index 99e4a3d6f..404ea6af8 100644
--- a/internal/gitaly/service/ref/refs_test.go
+++ b/internal/gitaly/service/ref/refs_test.go
@@ -12,7 +12,6 @@ import (
 
 	"github.com/stretchr/testify/require"
 	"gitlab.com/gitlab-org/gitaly/v15/internal/git"
-	"gitlab.com/gitlab-org/gitaly/v15/internal/git/catfile"
 	"gitlab.com/gitlab-org/gitaly/v15/internal/git/gittest"
 	"gitlab.com/gitlab-org/gitaly/v15/internal/git/localrepo"
 	"gitlab.com/gitlab-org/gitaly/v15/internal/git/updateref"
@@ -863,300 +862,3 @@ func TestListBranchNamesContainingCommit(t *testing.T) {
 		})
 	}
 }
-
-func TestSuccessfulFindTagRequest(t *testing.T) {
-	ctx := testhelper.Context(t)
-	cfg, repoProto, repoPath, client := setupRefService(ctx, t)
-
-	repo := localrepo.NewTestRepo(t, cfg, repoProto)
-
-	blobID := git.ObjectID("faaf198af3a36dbf41961466703cc1d47c61d051")
-	commitID := git.ObjectID("6f6d7e7ed97bb5f0054f2b1df789b39ca89b6ff9")
-
-	gitCommit := testhelper.GitLabTestCommit(commitID.String())
-
-	bigCommitID := gittest.WriteCommit(t, cfg, repoPath,
-		gittest.WithBranch("local-big-commits"),
-		gittest.WithMessage("An empty commit with REALLY BIG message\n\n"+strings.Repeat("a", helper.MaxCommitOrTagMessageSize+1)),
-		gittest.WithParents("60ecb67744cb56576c30214ff52294f8ce2def98"),
-	)
-	bigCommit, err := repo.ReadCommit(ctx, git.Revision(bigCommitID))
-	require.NoError(t, err)
-
-	annotatedTagID := gittest.WriteTag(t, cfg, repoPath, "v1.2.0", blobID.Revision(), gittest.WriteTagConfig{Message: "Blob tag"})
-
-	gittest.WriteTag(t, cfg, repoPath, "v1.3.0", commitID.Revision())
-	gittest.WriteTag(t, cfg, repoPath, "v1.4.0", blobID.Revision())
-
-	// To test recursive resolving to a commit
-	gittest.WriteTag(t, cfg, repoPath, "v1.5.0", "v1.3.0")
-
-	// A tag to commit with a big message
-	gittest.WriteTag(t, cfg, repoPath, "v1.6.0", bigCommitID.Revision())
-
-	// A tag with a big message
-	bigMessage := strings.Repeat("a", 11*1024)
-	bigMessageTag1ID := gittest.WriteTag(t, cfg, repoPath, "v1.7.0", commitID.Revision(), gittest.WriteTagConfig{Message: bigMessage})
-
-	// A tag with a commit id as its name
-	commitTagID := gittest.WriteTag(t, cfg, repoPath, commitID.String(), commitID.Revision(), gittest.WriteTagConfig{Message: "commit tag with a commit sha as the name"})
-
-	// a tag of a tag
-	tagOfTagID := gittest.WriteTag(t, cfg, repoPath, "tag-of-tag", commitTagID.Revision(), gittest.WriteTagConfig{Message: "tag of a tag"})
-
-	expectedTags := []*gitalypb.Tag{
-		{
-			Name:         []byte(commitID),
-			Id:           commitTagID.String(),
-			TargetCommit: gitCommit,
-			Message:      []byte("commit tag with a commit sha as the name"),
-			MessageSize:  40,
-			Tagger: &gitalypb.CommitAuthor{
-				Name:     []byte(gittest.DefaultCommitterName),
-				Email:    []byte(gittest.DefaultCommitterMail),
-				Date:     timestamppb.New(gittest.DefaultCommitTime),
-				Timezone: []byte("+0100"),
-			},
-		},
-		{
-			Name:         []byte("tag-of-tag"),
-			Id:           tagOfTagID.String(),
-			TargetCommit: gitCommit,
-			Message:      []byte("tag of a tag"),
-			MessageSize:  12,
-			Tagger: &gitalypb.CommitAuthor{
-				Name:     []byte(gittest.DefaultCommitterName),
-				Email:    []byte(gittest.DefaultCommitterMail),
-				Date:     timestamppb.New(gittest.DefaultCommitTime),
-				Timezone: []byte("+0100"),
-			},
-		},
-		{
-			Name:         []byte("v1.0.0"),
-			Id:           "f4e6814c3e4e7a0de82a9e7cd20c626cc963a2f8",
-			TargetCommit: gitCommit,
-			Message:      []byte("Release"),
-			MessageSize:  7,
-			Tagger: &gitalypb.CommitAuthor{
-				Name:     []byte("Dmitriy Zaporozhets"),
-				Email:    []byte("dmitriy.zaporozhets@gmail.com"),
-				Date:     &timestamppb.Timestamp{Seconds: 1393491299},
-				Timezone: []byte("+0200"),
-			},
-			SignatureType: gitalypb.SignatureType_NONE,
-		},
-		{
-			Name:         []byte("v1.1.0"),
-			Id:           "8a2a6eb295bb170b34c24c76c49ed0e9b2eaf34b",
-			TargetCommit: testhelper.GitLabTestCommit("5937ac0a7beb003549fc5fd26fc247adbce4a52e"),
-			Message:      []byte("Version 1.1.0"),
-			MessageSize:  13,
-			Tagger: &gitalypb.CommitAuthor{
-				Name:     []byte("Dmitriy Zaporozhets"),
-				Email:    []byte("dmitriy.zaporozhets@gmail.com"),
-				Date:     &timestamppb.Timestamp{Seconds: 1393505709},
-				Timezone: []byte("+0200"),
-			},
-		},
-		{
-			Name:         []byte("v1.1.1"),
-			Id:           "8f03acbcd11c53d9c9468078f32a2622005a4841",
-			TargetCommit: testhelper.GitLabTestCommit("189a6c924013fc3fe40d6f1ec1dc20214183bc97"),
-			Message:      []byte("x509 signed tag\n-----BEGIN SIGNED MESSAGE-----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\nSDH1i0K32NyFbnh0BSos7njq7ELqKlYBsoB/sZfaH2vKy5U=\n-----END SIGNED MESSAGE-----"),
-			MessageSize:  6494,
-			Tagger: &gitalypb.CommitAuthor{
-				Name:     []byte("Roger Meier"),
-				Email:    []byte("r.meier@siemens.com"),
-				Date:     &timestamppb.Timestamp{Seconds: 1574261780},
-				Timezone: []byte("+0100"),
-			},
-			SignatureType: gitalypb.SignatureType_X509,
-		},
-		{
-			Name:        []byte("v1.2.0"),
-			Id:          annotatedTagID.String(),
-			Message:     []byte("Blob tag"),
-			MessageSize: 8,
-			Tagger: &gitalypb.CommitAuthor{
-				Name:     []byte(gittest.DefaultCommitterName),
-				Email:    []byte(gittest.DefaultCommitterMail),
-				Date:     timestamppb.New(gittest.DefaultCommitTime),
-				Timezone: []byte("+0100"),
-			},
-		},
-		{
-			Name:         []byte("v1.3.0"),
-			Id:           commitID.String(),
-			TargetCommit: gitCommit,
-		},
-		{
-			Name: []byte("v1.4.0"),
-			Id:   blobID.String(),
-		},
-		{
-			Name:         []byte("v1.5.0"),
-			Id:           commitID.String(),
-			TargetCommit: gitCommit,
-		},
-		{
-			Name:         []byte("v1.6.0"),
-			Id:           bigCommitID.String(),
-			TargetCommit: bigCommit,
-		},
-		{
-			Name:         []byte("v1.7.0"),
-			Id:           bigMessageTag1ID.String(),
-			Message:      []byte(bigMessage[:helper.MaxCommitOrTagMessageSize]),
-			MessageSize:  int64(len(bigMessage)),
-			TargetCommit: gitCommit,
-			Tagger: &gitalypb.CommitAuthor{
-				Name:     []byte(gittest.DefaultCommitterName),
-				Email:    []byte(gittest.DefaultCommitterMail),
-				Date:     timestamppb.New(gittest.DefaultCommitTime),
-				Timezone: []byte("+0100"),
-			},
-		},
-	}
-
-	for _, expectedTag := range expectedTags {
-		rpcRequest := &gitalypb.FindTagRequest{Repository: repoProto, TagName: expectedTag.Name}
-
-		resp, err := client.FindTag(ctx, rpcRequest)
-		require.NoError(t, err)
-
-		testhelper.ProtoEqual(t, expectedTag, resp.GetTag())
-	}
-}
-
-func TestFindTagNestedTag(t *testing.T) {
-	ctx := testhelper.Context(t)
-	cfg, repoProto, repoPath, client := setupRefService(ctx, t)
-
-	repo := localrepo.NewTestRepo(t, cfg, repoProto)
-
-	blobID := git.ObjectID("faaf198af3a36dbf41961466703cc1d47c61d051")
-	commitID := git.ObjectID("6f6d7e7ed97bb5f0054f2b1df789b39ca89b6ff9")
-
-	testCases := []struct {
-		description string
-		depth       int
-		originalOid git.ObjectID
-	}{
-		{
-			description: "nested 1 deep, points to a commit",
-			depth:       1,
-			originalOid: commitID,
-		},
-		{
-			description: "nested 4 deep, points to a commit",
-			depth:       4,
-			originalOid: commitID,
-		},
-		{
-			description: "nested 3 deep, points to a blob",
-			depth:       3,
-			originalOid: blobID,
-		},
-		{
-			description: "nested 20 deep, points to a commit",
-			depth:       20,
-			originalOid: commitID,
-		},
-	}
-
-	for _, tc := range testCases {
-		t.Run(tc.description, func(t *testing.T) {
-			tags, err := repo.GetReferences(ctx, "refs/tags/")
-			require.NoError(t, err)
-
-			updater, err := updateref.New(ctx, repo)
-			require.NoError(t, err)
-			for _, tag := range tags {
-				require.NoError(t, updater.Delete(tag.Name))
-			}
-			require.NoError(t, updater.Commit())
-
-			catfileCache := catfile.NewCache(cfg)
-			defer catfileCache.Stop()
-
-			objectReader, cancel, err := catfileCache.ObjectReader(ctx, repo)
-			require.NoError(t, err)
-			defer cancel()
-
-			objectInfoReader, cancel, err := catfileCache.ObjectInfoReader(ctx, repo)
-			require.NoError(t, err)
-			defer cancel()
-
-			info, err := objectInfoReader.Info(ctx, git.Revision(tc.originalOid))
-			require.NoError(t, err)
-
-			tagID := tc.originalOid
-			var tagName, tagMessage string
-
-			for depth := 0; depth < tc.depth; depth++ {
-				tagName = fmt.Sprintf("tag-depth-%d", depth)
-				tagMessage = fmt.Sprintf("a commit %d deep", depth)
-				tagID = gittest.WriteTag(t, cfg, repoPath, tagName, tagID.Revision(), gittest.WriteTagConfig{Message: tagMessage})
-			}
-			expectedTag := &gitalypb.Tag{
-				Name:        []byte(tagName),
-				Id:          tagID.String(),
-				Message:     []byte(tagMessage),
-				MessageSize: int64(len([]byte(tagMessage))),
-				Tagger: &gitalypb.CommitAuthor{
-					Name:     []byte(gittest.DefaultCommitterName),
-					Email:    []byte(gittest.DefaultCommitterMail),
-					Date:     timestamppb.New(gittest.DefaultCommitTime),
-					Timezone: []byte("+0100"),
-				},
-			}
-			if info.Type == "commit" {
-				commit, err := catfile.GetCommit(ctx, objectReader, git.Revision(tc.originalOid))
-				require.NoError(t, err)
-				expectedTag.TargetCommit = commit
-			}
-			rpcRequest := &gitalypb.FindTagRequest{Repository: repoProto, TagName: []byte(tagName)}
-
-			resp, err := client.FindTag(ctx, rpcRequest)
-			require.NoError(t, err)
-			require.Equal(t, expectedTag, resp.GetTag())
-		})
-	}
-}
-
-func TestInvalidFindTagRequest(t *testing.T) {
-	ctx := testhelper.Context(t)
-	_, repo, _, client := setupRefService(ctx, t)
-
-	testCases := []struct {
-		desc    string
-		request *gitalypb.FindTagRequest
-	}{
-		{
-			desc:    "empty request",
-			request: &gitalypb.FindTagRequest{},
-		},
-		{
-			desc: "invalid repo",
-			request: &gitalypb.FindTagRequest{
-				Repository: &gitalypb.Repository{
-					StorageName:  "fake",
-					RelativePath: "repo",
-				},
-			},
-		},
-		{
-			desc: "empty tag name",
-			request: &gitalypb.FindTagRequest{
-				Repository: repo,
-			},
-		},
-	}
-
-	for _, tc := range testCases {
-		t.Run(tc.desc, func(t *testing.T) {
-			_, err := client.FindTag(ctx, tc.request)
-			testhelper.RequireGrpcCode(t, err, codes.InvalidArgument)
-		})
-	}
-}
diff --git a/proto/errors.proto b/proto/errors.proto
index b4078aae1..4a600adc5 100644
--- a/proto/errors.proto
+++ b/proto/errors.proto
@@ -67,6 +67,12 @@ message ReferenceExistsError {
   string oid = 2;
 }
 
+// ReferenceNotFoundError is an error retruned when a reference that ought to exist does not exist.
+message ReferenceNotFoundError {
+  // ReferenceName is the name of the reference that does not exist.
+  bytes reference_name = 1;
+}
+
 // ReferenceUpdateError is an error returned when updating a reference has
 // failed.
 message ReferenceUpdateError {
diff --git a/proto/go/gitalypb/errors.pb.go b/proto/go/gitalypb/errors.pb.go
index 83d60620b..1b2c2d7f8 100644
--- a/proto/go/gitalypb/errors.pb.go
+++ b/proto/go/gitalypb/errors.pb.go
@@ -83,7 +83,7 @@ func (x CustomHookError_HookType) Number() protoreflect.EnumNumber {
 
 // Deprecated: Use CustomHookError_HookType.Descriptor instead.
 func (CustomHookError_HookType) EnumDescriptor() ([]byte, []int) {
-	return file_errors_proto_rawDescGZIP(), []int{10, 0}
+	return file_errors_proto_rawDescGZIP(), []int{11, 0}
 }
 
 // AccessCheckError is an error returned by GitLab's `/internal/allowed`
@@ -474,6 +474,55 @@ func (x *ReferenceExistsError) GetOid() string {
 	return ""
 }
 
+// ReferenceNotFoundError is an error retruned when a reference that ought to exist does not exist.
+type ReferenceNotFoundError struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	// ReferenceName is the name of the reference that does not exist.
+	ReferenceName []byte `protobuf:"bytes,1,opt,name=reference_name,json=referenceName,proto3" json:"reference_name,omitempty"`
+}
+
+func (x *ReferenceNotFoundError) Reset() {
+	*x = ReferenceNotFoundError{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_errors_proto_msgTypes[7]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *ReferenceNotFoundError) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*ReferenceNotFoundError) ProtoMessage() {}
+
+func (x *ReferenceNotFoundError) ProtoReflect() protoreflect.Message {
+	mi := &file_errors_proto_msgTypes[7]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use ReferenceNotFoundError.ProtoReflect.Descriptor instead.
+func (*ReferenceNotFoundError) Descriptor() ([]byte, []int) {
+	return file_errors_proto_rawDescGZIP(), []int{7}
+}
+
+func (x *ReferenceNotFoundError) GetReferenceName() []byte {
+	if x != nil {
+		return x.ReferenceName
+	}
+	return nil
+}
+
 // ReferenceUpdateError is an error returned when updating a reference has
 // failed.
 type ReferenceUpdateError struct {
@@ -492,7 +541,7 @@ type ReferenceUpdateError struct {
 func (x *ReferenceUpdateError) Reset() {
 	*x = ReferenceUpdateError{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_errors_proto_msgTypes[7]
+		mi := &file_errors_proto_msgTypes[8]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -505,7 +554,7 @@ func (x *ReferenceUpdateError) String() string {
 func (*ReferenceUpdateError) ProtoMessage() {}
 
 func (x *ReferenceUpdateError) ProtoReflect() protoreflect.Message {
-	mi := &file_errors_proto_msgTypes[7]
+	mi := &file_errors_proto_msgTypes[8]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -518,7 +567,7 @@ func (x *ReferenceUpdateError) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use ReferenceUpdateError.ProtoReflect.Descriptor instead.
 func (*ReferenceUpdateError) Descriptor() ([]byte, []int) {
-	return file_errors_proto_rawDescGZIP(), []int{7}
+	return file_errors_proto_rawDescGZIP(), []int{8}
 }
 
 func (x *ReferenceUpdateError) GetReferenceName() []byte {
@@ -556,7 +605,7 @@ type ResolveRevisionError struct {
 func (x *ResolveRevisionError) Reset() {
 	*x = ResolveRevisionError{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_errors_proto_msgTypes[8]
+		mi := &file_errors_proto_msgTypes[9]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -569,7 +618,7 @@ func (x *ResolveRevisionError) String() string {
 func (*ResolveRevisionError) ProtoMessage() {}
 
 func (x *ResolveRevisionError) ProtoReflect() protoreflect.Message {
-	mi := &file_errors_proto_msgTypes[8]
+	mi := &file_errors_proto_msgTypes[9]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -582,7 +631,7 @@ func (x *ResolveRevisionError) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use ResolveRevisionError.ProtoReflect.Descriptor instead.
 func (*ResolveRevisionError) Descriptor() ([]byte, []int) {
-	return file_errors_proto_rawDescGZIP(), []int{8}
+	return file_errors_proto_rawDescGZIP(), []int{9}
 }
 
 func (x *ResolveRevisionError) GetRevision() []byte {
@@ -608,7 +657,7 @@ type LimitError struct {
 func (x *LimitError) Reset() {
 	*x = LimitError{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_errors_proto_msgTypes[9]
+		mi := &file_errors_proto_msgTypes[10]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -621,7 +670,7 @@ func (x *LimitError) String() string {
 func (*LimitError) ProtoMessage() {}
 
 func (x *LimitError) ProtoReflect() protoreflect.Message {
-	mi := &file_errors_proto_msgTypes[9]
+	mi := &file_errors_proto_msgTypes[10]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -634,7 +683,7 @@ func (x *LimitError) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use LimitError.ProtoReflect.Descriptor instead.
 func (*LimitError) Descriptor() ([]byte, []int) {
-	return file_errors_proto_rawDescGZIP(), []int{9}
+	return file_errors_proto_rawDescGZIP(), []int{10}
 }
 
 func (x *LimitError) GetErrorMessage() string {
@@ -669,7 +718,7 @@ type CustomHookError struct {
 func (x *CustomHookError) Reset() {
 	*x = CustomHookError{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_errors_proto_msgTypes[10]
+		mi := &file_errors_proto_msgTypes[11]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -682,7 +731,7 @@ func (x *CustomHookError) String() string {
 func (*CustomHookError) ProtoMessage() {}
 
 func (x *CustomHookError) ProtoReflect() protoreflect.Message {
-	mi := &file_errors_proto_msgTypes[10]
+	mi := &file_errors_proto_msgTypes[11]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -695,7 +744,7 @@ func (x *CustomHookError) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use CustomHookError.ProtoReflect.Descriptor instead.
 func (*CustomHookError) Descriptor() ([]byte, []int) {
-	return file_errors_proto_rawDescGZIP(), []int{10}
+	return file_errors_proto_rawDescGZIP(), []int{11}
 }
 
 func (x *CustomHookError) GetStdout() []byte {
@@ -759,43 +808,47 @@ var file_errors_proto_rawDesc = []byte{
 	0x72, 0x65, 0x6e, 0x63, 0x65, 0x5f, 0x6e, 0x61, 0x6d, 0x65, 0x18, 0x01, 0x20, 0x01, 0x28, 0x0c,
 	0x52, 0x0d, 0x72, 0x65, 0x66, 0x65, 0x72, 0x65, 0x6e, 0x63, 0x65, 0x4e, 0x61, 0x6d, 0x65, 0x12,
 	0x10, 0x0a, 0x03, 0x6f, 0x69, 0x64, 0x18, 0x02, 0x20, 0x01, 0x28, 0x09, 0x52, 0x03, 0x6f, 0x69,
-	0x64, 0x22, 0x6f, 0x0a, 0x14, 0x52, 0x65, 0x66, 0x65, 0x72, 0x65, 0x6e, 0x63, 0x65, 0x55, 0x70,
-	0x64, 0x61, 0x74, 0x65, 0x45, 0x72, 0x72, 0x6f, 0x72, 0x12, 0x25, 0x0a, 0x0e, 0x72, 0x65, 0x66,
-	0x65, 0x72, 0x65, 0x6e, 0x63, 0x65, 0x5f, 0x6e, 0x61, 0x6d, 0x65, 0x18, 0x01, 0x20, 0x01, 0x28,
-	0x0c, 0x52, 0x0d, 0x72, 0x65, 0x66, 0x65, 0x72, 0x65, 0x6e, 0x63, 0x65, 0x4e, 0x61, 0x6d, 0x65,
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+	0x65, 0x76, 0x69, 0x73, 0x69, 0x6f, 0x6e, 0x18, 0x01, 0x20, 0x01, 0x28, 0x0c, 0x52, 0x08, 0x72,
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+	0x65, 0x73, 0x73, 0x61, 0x67, 0x65, 0x18, 0x01, 0x20, 0x01, 0x28, 0x09, 0x52, 0x0c, 0x65, 0x72,
+	0x72, 0x6f, 0x72, 0x4d, 0x65, 0x73, 0x73, 0x61, 0x67, 0x65, 0x12, 0x3a, 0x0a, 0x0b, 0x72, 0x65,
+	0x74, 0x72, 0x79, 0x5f, 0x61, 0x66, 0x74, 0x65, 0x72, 0x18, 0x02, 0x20, 0x01, 0x28, 0x0b, 0x32,
+	0x19, 0x2e, 0x67, 0x6f, 0x6f, 0x67, 0x6c, 0x65, 0x2e, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x62, 0x75,
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+	0x64, 0x6f, 0x75, 0x74, 0x18, 0x01, 0x20, 0x01, 0x28, 0x0c, 0x52, 0x06, 0x73, 0x74, 0x64, 0x6f,
+	0x75, 0x74, 0x12, 0x16, 0x0a, 0x06, 0x73, 0x74, 0x64, 0x65, 0x72, 0x72, 0x18, 0x02, 0x20, 0x01,
+	0x28, 0x0c, 0x52, 0x06, 0x73, 0x74, 0x64, 0x65, 0x72, 0x72, 0x12, 0x3d, 0x0a, 0x09, 0x68, 0x6f,
+	0x6f, 0x6b, 0x5f, 0x74, 0x79, 0x70, 0x65, 0x18, 0x03, 0x20, 0x01, 0x28, 0x0e, 0x32, 0x20, 0x2e,
+	0x67, 0x69, 0x74, 0x61, 0x6c, 0x79, 0x2e, 0x43, 0x75, 0x73, 0x74, 0x6f, 0x6d, 0x48, 0x6f, 0x6f,
+	0x6b, 0x45, 0x72, 0x72, 0x6f, 0x72, 0x2e, 0x48, 0x6f, 0x6f, 0x6b, 0x54, 0x79, 0x70, 0x65, 0x52,
+	0x08, 0x68, 0x6f, 0x6f, 0x6b, 0x54, 0x79, 0x70, 0x65, 0x22, 0x70, 0x0a, 0x08, 0x48, 0x6f, 0x6f,
+	0x6b, 0x54, 0x79, 0x70, 0x65, 0x12, 0x19, 0x0a, 0x15, 0x48, 0x4f, 0x4f, 0x4b, 0x5f, 0x54, 0x59,
+	0x50, 0x45, 0x5f, 0x55, 0x4e, 0x53, 0x50, 0x45, 0x43, 0x49, 0x46, 0x49, 0x45, 0x44, 0x10, 0x00,
+	0x12, 0x18, 0x0a, 0x14, 0x48, 0x4f, 0x4f, 0x4b, 0x5f, 0x54, 0x59, 0x50, 0x45, 0x5f, 0x50, 0x52,
+	0x45, 0x52, 0x45, 0x43, 0x45, 0x49, 0x56, 0x45, 0x10, 0x01, 0x12, 0x14, 0x0a, 0x10, 0x48, 0x4f,
+	0x4f, 0x4b, 0x5f, 0x54, 0x59, 0x50, 0x45, 0x5f, 0x55, 0x50, 0x44, 0x41, 0x54, 0x45, 0x10, 0x02,
+	0x12, 0x19, 0x0a, 0x15, 0x48, 0x4f, 0x4f, 0x4b, 0x5f, 0x54, 0x59, 0x50, 0x45, 0x5f, 0x50, 0x4f,
+	0x53, 0x54, 0x52, 0x45, 0x43, 0x45, 0x49, 0x56, 0x45, 0x10, 0x03, 0x42, 0x34, 0x5a, 0x32, 0x67,
+	0x69, 0x74, 0x6c, 0x61, 0x62, 0x2e, 0x63, 0x6f, 0x6d, 0x2f, 0x67, 0x69, 0x74, 0x6c, 0x61, 0x62,
+	0x2d, 0x6f, 0x72, 0x67, 0x2f, 0x67, 0x69, 0x74, 0x61, 0x6c, 0x79, 0x2f, 0x76, 0x31, 0x35, 0x2f,
+	0x70, 0x72, 0x6f, 0x74, 0x6f, 0x2f, 0x67, 0x6f, 0x2f, 0x67, 0x69, 0x74, 0x61, 0x6c, 0x79, 0x70,
+	0x62, 0x62, 0x06, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x33,
 }
 
 var (
@@ -811,7 +864,7 @@ func file_errors_proto_rawDescGZIP() []byte {
 }
 
 var file_errors_proto_enumTypes = make([]protoimpl.EnumInfo, 1)
-var file_errors_proto_msgTypes = make([]protoimpl.MessageInfo, 11)
+var file_errors_proto_msgTypes = make([]protoimpl.MessageInfo, 12)
 var file_errors_proto_goTypes = []interface{}{
 	(CustomHookError_HookType)(0),      // 0: gitaly.CustomHookError.HookType
 	(*AccessCheckError)(nil),           // 1: gitaly.AccessCheckError
@@ -821,14 +874,15 @@ var file_errors_proto_goTypes = []interface{}{
 	(*MergeConflictError)(nil),         // 5: gitaly.MergeConflictError
 	(*ReferencesLockedError)(nil),      // 6: gitaly.ReferencesLockedError
 	(*ReferenceExistsError)(nil),       // 7: gitaly.ReferenceExistsError
-	(*ReferenceUpdateError)(nil),       // 8: gitaly.ReferenceUpdateError
-	(*ResolveRevisionError)(nil),       // 9: gitaly.ResolveRevisionError
-	(*LimitError)(nil),                 // 10: gitaly.LimitError
-	(*CustomHookError)(nil),            // 11: gitaly.CustomHookError
-	(*durationpb.Duration)(nil),        // 12: google.protobuf.Duration
+	(*ReferenceNotFoundError)(nil),     // 8: gitaly.ReferenceNotFoundError
+	(*ReferenceUpdateError)(nil),       // 9: gitaly.ReferenceUpdateError
+	(*ResolveRevisionError)(nil),       // 10: gitaly.ResolveRevisionError
+	(*LimitError)(nil),                 // 11: gitaly.LimitError
+	(*CustomHookError)(nil),            // 12: gitaly.CustomHookError
+	(*durationpb.Duration)(nil),        // 13: google.protobuf.Duration
 }
 var file_errors_proto_depIdxs = []int32{
-	12, // 0: gitaly.LimitError.retry_after:type_name -> google.protobuf.Duration
+	13, // 0: gitaly.LimitError.retry_after:type_name -> google.protobuf.Duration
 	0,  // 1: gitaly.CustomHookError.hook_type:type_name -> gitaly.CustomHookError.HookType
 	2,  // [2:2] is the sub-list for method output_type
 	2,  // [2:2] is the sub-list for method input_type
@@ -928,7 +982,7 @@ func file_errors_proto_init() {
 			}
 		}
 		file_errors_proto_msgTypes[7].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*ReferenceUpdateError); i {
+			switch v := v.(*ReferenceNotFoundError); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -940,7 +994,7 @@ func file_errors_proto_init() {
 			}
 		}
 		file_errors_proto_msgTypes[8].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*ResolveRevisionError); i {
+			switch v := v.(*ReferenceUpdateError); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -952,7 +1006,7 @@ func file_errors_proto_init() {
 			}
 		}
 		file_errors_proto_msgTypes[9].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*LimitError); i {
+			switch v := v.(*ResolveRevisionError); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -964,6 +1018,18 @@ func file_errors_proto_init() {
 			}
 		}
 		file_errors_proto_msgTypes[10].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*LimitError); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_errors_proto_msgTypes[11].Exporter = func(v interface{}, i int) interface{} {
 			switch v := v.(*CustomHookError); i {
 			case 0:
 				return &v.state
@@ -982,7 +1048,7 @@ func file_errors_proto_init() {
 			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
 			RawDescriptor: file_errors_proto_rawDesc,
 			NumEnums:      1,
-			NumMessages:   11,
+			NumMessages:   12,
 			NumExtensions: 0,
 			NumServices:   0,
 		},
diff --git a/proto/go/gitalypb/ref.pb.go b/proto/go/gitalypb/ref.pb.go
index e1af47561..e166c81d6 100644
--- a/proto/go/gitalypb/ref.pb.go
+++ b/proto/go/gitalypb/ref.pb.go
@@ -120,7 +120,7 @@ func (x FindAllTagsRequest_SortBy_Key) Number() protoreflect.EnumNumber {
 
 // Deprecated: Use FindAllTagsRequest_SortBy_Key.Descriptor instead.
 func (FindAllTagsRequest_SortBy_Key) EnumDescriptor() ([]byte, []int) {
-	return file_ref_proto_rawDescGZIP(), []int{14, 0, 0}
+	return file_ref_proto_rawDescGZIP(), []int{15, 0, 0}
 }
 
 // This comment is left unintentionally blank.
@@ -177,7 +177,7 @@ func (x CreateBranchResponse_Status) Number() protoreflect.EnumNumber {
 
 // Deprecated: Use CreateBranchResponse_Status.Descriptor instead.
 func (CreateBranchResponse_Status) EnumDescriptor() ([]byte, []int) {
-	return file_ref_proto_rawDescGZIP(), []int{19, 0}
+	return file_ref_proto_rawDescGZIP(), []int{20, 0}
 }
 
 // This comment is left unintentionally blank.
@@ -234,7 +234,7 @@ func (x ListRefsRequest_SortBy_Key) Number() protoreflect.EnumNumber {
 
 // Deprecated: Use ListRefsRequest_SortBy_Key.Descriptor instead.
 func (ListRefsRequest_SortBy_Key) EnumDescriptor() ([]byte, []int) {
-	return file_ref_proto_rawDescGZIP(), []int{39, 0, 0}
+	return file_ref_proto_rawDescGZIP(), []int{40, 0, 0}
 }
 
 // This comment is left unintentionally blank.
@@ -937,15 +937,17 @@ func (x *FindAllBranchesResponse) GetBranches() []*FindAllBranchesResponse_Branc
 	return nil
 }
 
-// This comment is left unintentionally blank.
+// FindTagRequest is a request for the FindTag RPC.
 type FindTagRequest struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
 	unknownFields protoimpl.UnknownFields
 
-	// This comment is left unintentionally blank.
+	// Repository is the repository to look up the tag in.
 	Repository *Repository `protobuf:"bytes,1,opt,name=repository,proto3" json:"repository,omitempty"`
-	// This comment is left unintentionally blank.
+	// TagName is the name of the tag that should be looked up. The caller is supposed to pass in the
+	// tag name only, so if e.g. a tag `refs/tags/v1.0.0` exists, then the caller should pass `v1.0.0`
+	// as argument.
 	TagName []byte `protobuf:"bytes,2,opt,name=tag_name,json=tagName,proto3" json:"tag_name,omitempty"`
 }
 
@@ -995,13 +997,13 @@ func (x *FindTagRequest) GetTagName() []byte {
 	return nil
 }
 
-// This comment is left unintentionally blank.
+// FindTagResponse is a response for the FindTag RPC.
 type FindTagResponse struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
 	unknownFields protoimpl.UnknownFields
 
-	// This comment is left unintentionally blank.
+	// Tag is the tag that was found.
 	Tag *Tag `protobuf:"bytes,1,opt,name=tag,proto3" json:"tag,omitempty"`
 }
 
@@ -1044,6 +1046,56 @@ func (x *FindTagResponse) GetTag() *Tag {
 	return nil
 }
 
+// FindTagError is an error that will be returned by the FindTag RPC under specific error
+// conditions.
+type FindTagError struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	// TagNotFound indicates that the tag was not found.
+	TagNotFound *ReferenceNotFoundError `protobuf:"bytes,1,opt,name=tag_not_found,json=tagNotFound,proto3" json:"tag_not_found,omitempty"`
+}
+
+func (x *FindTagError) Reset() {
+	*x = FindTagError{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_ref_proto_msgTypes[14]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *FindTagError) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*FindTagError) ProtoMessage() {}
+
+func (x *FindTagError) ProtoReflect() protoreflect.Message {
+	mi := &file_ref_proto_msgTypes[14]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use FindTagError.ProtoReflect.Descriptor instead.
+func (*FindTagError) Descriptor() ([]byte, []int) {
+	return file_ref_proto_rawDescGZIP(), []int{14}
+}
+
+func (x *FindTagError) GetTagNotFound() *ReferenceNotFoundError {
+	if x != nil {
+		return x.TagNotFound
+	}
+	return nil
+}
+
 // This comment is left unintentionally blank.
 type FindAllTagsRequest struct {
 	state         protoimpl.MessageState
@@ -1063,7 +1115,7 @@ type FindAllTagsRequest struct {
 func (x *FindAllTagsRequest) Reset() {
 	*x = FindAllTagsRequest{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_ref_proto_msgTypes[14]
+		mi := &file_ref_proto_msgTypes[15]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -1076,7 +1128,7 @@ func (x *FindAllTagsRequest) String() string {
 func (*FindAllTagsRequest) ProtoMessage() {}
 
 func (x *FindAllTagsRequest) ProtoReflect() protoreflect.Message {
-	mi := &file_ref_proto_msgTypes[14]
+	mi := &file_ref_proto_msgTypes[15]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -1089,7 +1141,7 @@ func (x *FindAllTagsRequest) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use FindAllTagsRequest.ProtoReflect.Descriptor instead.
 func (*FindAllTagsRequest) Descriptor() ([]byte, []int) {
-	return file_ref_proto_rawDescGZIP(), []int{14}
+	return file_ref_proto_rawDescGZIP(), []int{15}
 }
 
 func (x *FindAllTagsRequest) GetRepository() *Repository {
@@ -1126,7 +1178,7 @@ type FindAllTagsResponse struct {
 func (x *FindAllTagsResponse) Reset() {
 	*x = FindAllTagsResponse{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_ref_proto_msgTypes[15]
+		mi := &file_ref_proto_msgTypes[16]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -1139,7 +1191,7 @@ func (x *FindAllTagsResponse) String() string {
 func (*FindAllTagsResponse) ProtoMessage() {}
 
 func (x *FindAllTagsResponse) ProtoReflect() protoreflect.Message {
-	mi := &file_ref_proto_msgTypes[15]
+	mi := &file_ref_proto_msgTypes[16]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -1152,7 +1204,7 @@ func (x *FindAllTagsResponse) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use FindAllTagsResponse.ProtoReflect.Descriptor instead.
 func (*FindAllTagsResponse) Descriptor() ([]byte, []int) {
-	return file_ref_proto_rawDescGZIP(), []int{15}
+	return file_ref_proto_rawDescGZIP(), []int{16}
 }
 
 func (x *FindAllTagsResponse) GetTags() []*Tag {
@@ -1177,7 +1229,7 @@ type RefExistsRequest struct {
 func (x *RefExistsRequest) Reset() {
 	*x = RefExistsRequest{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_ref_proto_msgTypes[16]
+		mi := &file_ref_proto_msgTypes[17]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -1190,7 +1242,7 @@ func (x *RefExistsRequest) String() string {
 func (*RefExistsRequest) ProtoMessage() {}
 
 func (x *RefExistsRequest) ProtoReflect() protoreflect.Message {
-	mi := &file_ref_proto_msgTypes[16]
+	mi := &file_ref_proto_msgTypes[17]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -1203,7 +1255,7 @@ func (x *RefExistsRequest) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use RefExistsRequest.ProtoReflect.Descriptor instead.
 func (*RefExistsRequest) Descriptor() ([]byte, []int) {
-	return file_ref_proto_rawDescGZIP(), []int{16}
+	return file_ref_proto_rawDescGZIP(), []int{17}
 }
 
 func (x *RefExistsRequest) GetRepository() *Repository {
@@ -1233,7 +1285,7 @@ type RefExistsResponse struct {
 func (x *RefExistsResponse) Reset() {
 	*x = RefExistsResponse{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_ref_proto_msgTypes[17]
+		mi := &file_ref_proto_msgTypes[18]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -1246,7 +1298,7 @@ func (x *RefExistsResponse) String() string {
 func (*RefExistsResponse) ProtoMessage() {}
 
 func (x *RefExistsResponse) ProtoReflect() protoreflect.Message {
-	mi := &file_ref_proto_msgTypes[17]
+	mi := &file_ref_proto_msgTypes[18]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -1259,7 +1311,7 @@ func (x *RefExistsResponse) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use RefExistsResponse.ProtoReflect.Descriptor instead.
 func (*RefExistsResponse) Descriptor() ([]byte, []int) {
-	return file_ref_proto_rawDescGZIP(), []int{17}
+	return file_ref_proto_rawDescGZIP(), []int{18}
 }
 
 func (x *RefExistsResponse) GetValue() bool {
@@ -1286,7 +1338,7 @@ type CreateBranchRequest struct {
 func (x *CreateBranchRequest) Reset() {
 	*x = CreateBranchRequest{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_ref_proto_msgTypes[18]
+		mi := &file_ref_proto_msgTypes[19]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -1299,7 +1351,7 @@ func (x *CreateBranchRequest) String() string {
 func (*CreateBranchRequest) ProtoMessage() {}
 
 func (x *CreateBranchRequest) ProtoReflect() protoreflect.Message {
-	mi := &file_ref_proto_msgTypes[18]
+	mi := &file_ref_proto_msgTypes[19]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -1312,7 +1364,7 @@ func (x *CreateBranchRequest) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use CreateBranchRequest.ProtoReflect.Descriptor instead.
 func (*CreateBranchRequest) Descriptor() ([]byte, []int) {
-	return file_ref_proto_rawDescGZIP(), []int{18}
+	return file_ref_proto_rawDescGZIP(), []int{19}
 }
 
 func (x *CreateBranchRequest) GetRepository() *Repository {
@@ -1351,7 +1403,7 @@ type CreateBranchResponse struct {
 func (x *CreateBranchResponse) Reset() {
 	*x = CreateBranchResponse{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_ref_proto_msgTypes[19]
+		mi := &file_ref_proto_msgTypes[20]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -1364,7 +1416,7 @@ func (x *CreateBranchResponse) String() string {
 func (*CreateBranchResponse) ProtoMessage() {}
 
 func (x *CreateBranchResponse) ProtoReflect() protoreflect.Message {
-	mi := &file_ref_proto_msgTypes[19]
+	mi := &file_ref_proto_msgTypes[20]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -1377,7 +1429,7 @@ func (x *CreateBranchResponse) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use CreateBranchResponse.ProtoReflect.Descriptor instead.
 func (*CreateBranchResponse) Descriptor() ([]byte, []int) {
-	return file_ref_proto_rawDescGZIP(), []int{19}
+	return file_ref_proto_rawDescGZIP(), []int{20}
 }
 
 func (x *CreateBranchResponse) GetStatus() CreateBranchResponse_Status {
@@ -1409,7 +1461,7 @@ type DeleteBranchRequest struct {
 func (x *DeleteBranchRequest) Reset() {
 	*x = DeleteBranchRequest{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_ref_proto_msgTypes[20]
+		mi := &file_ref_proto_msgTypes[21]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -1422,7 +1474,7 @@ func (x *DeleteBranchRequest) String() string {
 func (*DeleteBranchRequest) ProtoMessage() {}
 
 func (x *DeleteBranchRequest) ProtoReflect() protoreflect.Message {
-	mi := &file_ref_proto_msgTypes[20]
+	mi := &file_ref_proto_msgTypes[21]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -1435,7 +1487,7 @@ func (x *DeleteBranchRequest) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use DeleteBranchRequest.ProtoReflect.Descriptor instead.
 func (*DeleteBranchRequest) Descriptor() ([]byte, []int) {
-	return file_ref_proto_rawDescGZIP(), []int{20}
+	return file_ref_proto_rawDescGZIP(), []int{21}
 }
 
 func (x *DeleteBranchRequest) GetRepository() *Repository {
@@ -1462,7 +1514,7 @@ type DeleteBranchResponse struct {
 func (x *DeleteBranchResponse) Reset() {
 	*x = DeleteBranchResponse{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_ref_proto_msgTypes[21]
+		mi := &file_ref_proto_msgTypes[22]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -1475,7 +1527,7 @@ func (x *DeleteBranchResponse) String() string {
 func (*DeleteBranchResponse) ProtoMessage() {}
 
 func (x *DeleteBranchResponse) ProtoReflect() protoreflect.Message {
-	mi := &file_ref_proto_msgTypes[21]
+	mi := &file_ref_proto_msgTypes[22]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -1488,7 +1540,7 @@ func (x *DeleteBranchResponse) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use DeleteBranchResponse.ProtoReflect.Descriptor instead.
 func (*DeleteBranchResponse) Descriptor() ([]byte, []int) {
-	return file_ref_proto_rawDescGZIP(), []int{21}
+	return file_ref_proto_rawDescGZIP(), []int{22}
 }
 
 // This comment is left unintentionally blank.
@@ -1507,7 +1559,7 @@ type FindBranchRequest struct {
 func (x *FindBranchRequest) Reset() {
 	*x = FindBranchRequest{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_ref_proto_msgTypes[22]
+		mi := &file_ref_proto_msgTypes[23]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -1520,7 +1572,7 @@ func (x *FindBranchRequest) String() string {
 func (*FindBranchRequest) ProtoMessage() {}
 
 func (x *FindBranchRequest) ProtoReflect() protoreflect.Message {
-	mi := &file_ref_proto_msgTypes[22]
+	mi := &file_ref_proto_msgTypes[23]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -1533,7 +1585,7 @@ func (x *FindBranchRequest) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use FindBranchRequest.ProtoReflect.Descriptor instead.
 func (*FindBranchRequest) Descriptor() ([]byte, []int) {
-	return file_ref_proto_rawDescGZIP(), []int{22}
+	return file_ref_proto_rawDescGZIP(), []int{23}
 }
 
 func (x *FindBranchRequest) GetRepository() *Repository {
@@ -1563,7 +1615,7 @@ type FindBranchResponse struct {
 func (x *FindBranchResponse) Reset() {
 	*x = FindBranchResponse{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_ref_proto_msgTypes[23]
+		mi := &file_ref_proto_msgTypes[24]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -1576,7 +1628,7 @@ func (x *FindBranchResponse) String() string {
 func (*FindBranchResponse) ProtoMessage() {}
 
 func (x *FindBranchResponse) ProtoReflect() protoreflect.Message {
-	mi := &file_ref_proto_msgTypes[23]
+	mi := &file_ref_proto_msgTypes[24]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -1589,7 +1641,7 @@ func (x *FindBranchResponse) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use FindBranchResponse.ProtoReflect.Descriptor instead.
 func (*FindBranchResponse) Descriptor() ([]byte, []int) {
-	return file_ref_proto_rawDescGZIP(), []int{23}
+	return file_ref_proto_rawDescGZIP(), []int{24}
 }
 
 func (x *FindBranchResponse) GetBranch() *Branch {
@@ -1616,7 +1668,7 @@ type DeleteRefsRequest struct {
 func (x *DeleteRefsRequest) Reset() {
 	*x = DeleteRefsRequest{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_ref_proto_msgTypes[24]
+		mi := &file_ref_proto_msgTypes[25]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -1629,7 +1681,7 @@ func (x *DeleteRefsRequest) String() string {
 func (*DeleteRefsRequest) ProtoMessage() {}
 
 func (x *DeleteRefsRequest) ProtoReflect() protoreflect.Message {
-	mi := &file_ref_proto_msgTypes[24]
+	mi := &file_ref_proto_msgTypes[25]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -1642,7 +1694,7 @@ func (x *DeleteRefsRequest) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use DeleteRefsRequest.ProtoReflect.Descriptor instead.
 func (*DeleteRefsRequest) Descriptor() ([]byte, []int) {
-	return file_ref_proto_rawDescGZIP(), []int{24}
+	return file_ref_proto_rawDescGZIP(), []int{25}
 }
 
 func (x *DeleteRefsRequest) GetRepository() *Repository {
@@ -1679,7 +1731,7 @@ type DeleteRefsResponse struct {
 func (x *DeleteRefsResponse) Reset() {
 	*x = DeleteRefsResponse{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_ref_proto_msgTypes[25]
+		mi := &file_ref_proto_msgTypes[26]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -1692,7 +1744,7 @@ func (x *DeleteRefsResponse) String() string {
 func (*DeleteRefsResponse) ProtoMessage() {}
 
 func (x *DeleteRefsResponse) ProtoReflect() protoreflect.Message {
-	mi := &file_ref_proto_msgTypes[25]
+	mi := &file_ref_proto_msgTypes[26]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -1705,7 +1757,7 @@ func (x *DeleteRefsResponse) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use DeleteRefsResponse.ProtoReflect.Descriptor instead.
 func (*DeleteRefsResponse) Descriptor() ([]byte, []int) {
-	return file_ref_proto_rawDescGZIP(), []int{25}
+	return file_ref_proto_rawDescGZIP(), []int{26}
 }
 
 func (x *DeleteRefsResponse) GetGitError() string {
@@ -1730,7 +1782,7 @@ type DeleteRefsError struct {
 func (x *DeleteRefsError) Reset() {
 	*x = DeleteRefsError{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_ref_proto_msgTypes[26]
+		mi := &file_ref_proto_msgTypes[27]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -1743,7 +1795,7 @@ func (x *DeleteRefsError) String() string {
 func (*DeleteRefsError) ProtoMessage() {}
 
 func (x *DeleteRefsError) ProtoReflect() protoreflect.Message {
-	mi := &file_ref_proto_msgTypes[26]
+	mi := &file_ref_proto_msgTypes[27]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -1756,7 +1808,7 @@ func (x *DeleteRefsError) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use DeleteRefsError.ProtoReflect.Descriptor instead.
 func (*DeleteRefsError) Descriptor() ([]byte, []int) {
-	return file_ref_proto_rawDescGZIP(), []int{26}
+	return file_ref_proto_rawDescGZIP(), []int{27}
 }
 
 func (m *DeleteRefsError) GetError() isDeleteRefsError_Error {
@@ -1818,7 +1870,7 @@ type ListBranchNamesContainingCommitRequest struct {
 func (x *ListBranchNamesContainingCommitRequest) Reset() {
 	*x = ListBranchNamesContainingCommitRequest{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_ref_proto_msgTypes[27]
+		mi := &file_ref_proto_msgTypes[28]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -1831,7 +1883,7 @@ func (x *ListBranchNamesContainingCommitRequest) String() string {
 func (*ListBranchNamesContainingCommitRequest) ProtoMessage() {}
 
 func (x *ListBranchNamesContainingCommitRequest) ProtoReflect() protoreflect.Message {
-	mi := &file_ref_proto_msgTypes[27]
+	mi := &file_ref_proto_msgTypes[28]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -1844,7 +1896,7 @@ func (x *ListBranchNamesContainingCommitRequest) ProtoReflect() protoreflect.Mes
 
 // Deprecated: Use ListBranchNamesContainingCommitRequest.ProtoReflect.Descriptor instead.
 func (*ListBranchNamesContainingCommitRequest) Descriptor() ([]byte, []int) {
-	return file_ref_proto_rawDescGZIP(), []int{27}
+	return file_ref_proto_rawDescGZIP(), []int{28}
 }
 
 func (x *ListBranchNamesContainingCommitRequest) GetRepository() *Repository {
@@ -1881,7 +1933,7 @@ type ListBranchNamesContainingCommitResponse struct {
 func (x *ListBranchNamesContainingCommitResponse) Reset() {
 	*x = ListBranchNamesContainingCommitResponse{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_ref_proto_msgTypes[28]
+		mi := &file_ref_proto_msgTypes[29]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -1894,7 +1946,7 @@ func (x *ListBranchNamesContainingCommitResponse) String() string {
 func (*ListBranchNamesContainingCommitResponse) ProtoMessage() {}
 
 func (x *ListBranchNamesContainingCommitResponse) ProtoReflect() protoreflect.Message {
-	mi := &file_ref_proto_msgTypes[28]
+	mi := &file_ref_proto_msgTypes[29]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -1907,7 +1959,7 @@ func (x *ListBranchNamesContainingCommitResponse) ProtoReflect() protoreflect.Me
 
 // Deprecated: Use ListBranchNamesContainingCommitResponse.ProtoReflect.Descriptor instead.
 func (*ListBranchNamesContainingCommitResponse) Descriptor() ([]byte, []int) {
-	return file_ref_proto_rawDescGZIP(), []int{28}
+	return file_ref_proto_rawDescGZIP(), []int{29}
 }
 
 func (x *ListBranchNamesContainingCommitResponse) GetBranchNames() [][]byte {
@@ -1935,7 +1987,7 @@ type ListTagNamesContainingCommitRequest struct {
 func (x *ListTagNamesContainingCommitRequest) Reset() {
 	*x = ListTagNamesContainingCommitRequest{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_ref_proto_msgTypes[29]
+		mi := &file_ref_proto_msgTypes[30]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -1948,7 +2000,7 @@ func (x *ListTagNamesContainingCommitRequest) String() string {
 func (*ListTagNamesContainingCommitRequest) ProtoMessage() {}
 
 func (x *ListTagNamesContainingCommitRequest) ProtoReflect() protoreflect.Message {
-	mi := &file_ref_proto_msgTypes[29]
+	mi := &file_ref_proto_msgTypes[30]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -1961,7 +2013,7 @@ func (x *ListTagNamesContainingCommitRequest) ProtoReflect() protoreflect.Messag
 
 // Deprecated: Use ListTagNamesContainingCommitRequest.ProtoReflect.Descriptor instead.
 func (*ListTagNamesContainingCommitRequest) Descriptor() ([]byte, []int) {
-	return file_ref_proto_rawDescGZIP(), []int{29}
+	return file_ref_proto_rawDescGZIP(), []int{30}
 }
 
 func (x *ListTagNamesContainingCommitRequest) GetRepository() *Repository {
@@ -1998,7 +2050,7 @@ type ListTagNamesContainingCommitResponse struct {
 func (x *ListTagNamesContainingCommitResponse) Reset() {
 	*x = ListTagNamesContainingCommitResponse{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_ref_proto_msgTypes[30]
+		mi := &file_ref_proto_msgTypes[31]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -2011,7 +2063,7 @@ func (x *ListTagNamesContainingCommitResponse) String() string {
 func (*ListTagNamesContainingCommitResponse) ProtoMessage() {}
 
 func (x *ListTagNamesContainingCommitResponse) ProtoReflect() protoreflect.Message {
-	mi := &file_ref_proto_msgTypes[30]
+	mi := &file_ref_proto_msgTypes[31]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -2024,7 +2076,7 @@ func (x *ListTagNamesContainingCommitResponse) ProtoReflect() protoreflect.Messa
 
 // Deprecated: Use ListTagNamesContainingCommitResponse.ProtoReflect.Descriptor instead.
 func (*ListTagNamesContainingCommitResponse) Descriptor() ([]byte, []int) {
-	return file_ref_proto_rawDescGZIP(), []int{30}
+	return file_ref_proto_rawDescGZIP(), []int{31}
 }
 
 func (x *ListTagNamesContainingCommitResponse) GetTagNames() [][]byte {
@@ -2051,7 +2103,7 @@ type GetTagSignaturesRequest struct {
 func (x *GetTagSignaturesRequest) Reset() {
 	*x = GetTagSignaturesRequest{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_ref_proto_msgTypes[31]
+		mi := &file_ref_proto_msgTypes[32]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -2064,7 +2116,7 @@ func (x *GetTagSignaturesRequest) String() string {
 func (*GetTagSignaturesRequest) ProtoMessage() {}
 
 func (x *GetTagSignaturesRequest) ProtoReflect() protoreflect.Message {
-	mi := &file_ref_proto_msgTypes[31]
+	mi := &file_ref_proto_msgTypes[32]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -2077,7 +2129,7 @@ func (x *GetTagSignaturesRequest) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use GetTagSignaturesRequest.ProtoReflect.Descriptor instead.
 func (*GetTagSignaturesRequest) Descriptor() ([]byte, []int) {
-	return file_ref_proto_rawDescGZIP(), []int{31}
+	return file_ref_proto_rawDescGZIP(), []int{32}
 }
 
 func (x *GetTagSignaturesRequest) GetRepository() *Repository {
@@ -2109,7 +2161,7 @@ type GetTagSignaturesResponse struct {
 func (x *GetTagSignaturesResponse) Reset() {
 	*x = GetTagSignaturesResponse{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_ref_proto_msgTypes[32]
+		mi := &file_ref_proto_msgTypes[33]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -2122,7 +2174,7 @@ func (x *GetTagSignaturesResponse) String() string {
 func (*GetTagSignaturesResponse) ProtoMessage() {}
 
 func (x *GetTagSignaturesResponse) ProtoReflect() protoreflect.Message {
-	mi := &file_ref_proto_msgTypes[32]
+	mi := &file_ref_proto_msgTypes[33]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -2135,7 +2187,7 @@ func (x *GetTagSignaturesResponse) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use GetTagSignaturesResponse.ProtoReflect.Descriptor instead.
 func (*GetTagSignaturesResponse) Descriptor() ([]byte, []int) {
-	return file_ref_proto_rawDescGZIP(), []int{32}
+	return file_ref_proto_rawDescGZIP(), []int{33}
 }
 
 func (x *GetTagSignaturesResponse) GetSignatures() []*GetTagSignaturesResponse_TagSignature {
@@ -2160,7 +2212,7 @@ type GetTagMessagesRequest struct {
 func (x *GetTagMessagesRequest) Reset() {
 	*x = GetTagMessagesRequest{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_ref_proto_msgTypes[33]
+		mi := &file_ref_proto_msgTypes[34]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -2173,7 +2225,7 @@ func (x *GetTagMessagesRequest) String() string {
 func (*GetTagMessagesRequest) ProtoMessage() {}
 
 func (x *GetTagMessagesRequest) ProtoReflect() protoreflect.Message {
-	mi := &file_ref_proto_msgTypes[33]
+	mi := &file_ref_proto_msgTypes[34]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -2186,7 +2238,7 @@ func (x *GetTagMessagesRequest) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use GetTagMessagesRequest.ProtoReflect.Descriptor instead.
 func (*GetTagMessagesRequest) Descriptor() ([]byte, []int) {
-	return file_ref_proto_rawDescGZIP(), []int{33}
+	return file_ref_proto_rawDescGZIP(), []int{34}
 }
 
 func (x *GetTagMessagesRequest) GetRepository() *Repository {
@@ -2218,7 +2270,7 @@ type GetTagMessagesResponse struct {
 func (x *GetTagMessagesResponse) Reset() {
 	*x = GetTagMessagesResponse{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_ref_proto_msgTypes[34]
+		mi := &file_ref_proto_msgTypes[35]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -2231,7 +2283,7 @@ func (x *GetTagMessagesResponse) String() string {
 func (*GetTagMessagesResponse) ProtoMessage() {}
 
 func (x *GetTagMessagesResponse) ProtoReflect() protoreflect.Message {
-	mi := &file_ref_proto_msgTypes[34]
+	mi := &file_ref_proto_msgTypes[35]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -2244,7 +2296,7 @@ func (x *GetTagMessagesResponse) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use GetTagMessagesResponse.ProtoReflect.Descriptor instead.
 func (*GetTagMessagesResponse) Descriptor() ([]byte, []int) {
-	return file_ref_proto_rawDescGZIP(), []int{34}
+	return file_ref_proto_rawDescGZIP(), []int{35}
 }
 
 func (x *GetTagMessagesResponse) GetMessage() []byte {
@@ -2276,7 +2328,7 @@ type FindAllRemoteBranchesRequest struct {
 func (x *FindAllRemoteBranchesRequest) Reset() {
 	*x = FindAllRemoteBranchesRequest{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_ref_proto_msgTypes[35]
+		mi := &file_ref_proto_msgTypes[36]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -2289,7 +2341,7 @@ func (x *FindAllRemoteBranchesRequest) String() string {
 func (*FindAllRemoteBranchesRequest) ProtoMessage() {}
 
 func (x *FindAllRemoteBranchesRequest) ProtoReflect() protoreflect.Message {
-	mi := &file_ref_proto_msgTypes[35]
+	mi := &file_ref_proto_msgTypes[36]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -2302,7 +2354,7 @@ func (x *FindAllRemoteBranchesRequest) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use FindAllRemoteBranchesRequest.ProtoReflect.Descriptor instead.
 func (*FindAllRemoteBranchesRequest) Descriptor() ([]byte, []int) {
-	return file_ref_proto_rawDescGZIP(), []int{35}
+	return file_ref_proto_rawDescGZIP(), []int{36}
 }
 
 func (x *FindAllRemoteBranchesRequest) GetRepository() *Repository {
@@ -2332,7 +2384,7 @@ type FindAllRemoteBranchesResponse struct {
 func (x *FindAllRemoteBranchesResponse) Reset() {
 	*x = FindAllRemoteBranchesResponse{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_ref_proto_msgTypes[36]
+		mi := &file_ref_proto_msgTypes[37]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -2345,7 +2397,7 @@ func (x *FindAllRemoteBranchesResponse) String() string {
 func (*FindAllRemoteBranchesResponse) ProtoMessage() {}
 
 func (x *FindAllRemoteBranchesResponse) ProtoReflect() protoreflect.Message {
-	mi := &file_ref_proto_msgTypes[36]
+	mi := &file_ref_proto_msgTypes[37]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -2358,7 +2410,7 @@ func (x *FindAllRemoteBranchesResponse) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use FindAllRemoteBranchesResponse.ProtoReflect.Descriptor instead.
 func (*FindAllRemoteBranchesResponse) Descriptor() ([]byte, []int) {
-	return file_ref_proto_rawDescGZIP(), []int{36}
+	return file_ref_proto_rawDescGZIP(), []int{37}
 }
 
 func (x *FindAllRemoteBranchesResponse) GetBranches() []*Branch {
@@ -2381,7 +2433,7 @@ type PackRefsRequest struct {
 func (x *PackRefsRequest) Reset() {
 	*x = PackRefsRequest{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_ref_proto_msgTypes[37]
+		mi := &file_ref_proto_msgTypes[38]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -2394,7 +2446,7 @@ func (x *PackRefsRequest) String() string {
 func (*PackRefsRequest) ProtoMessage() {}
 
 func (x *PackRefsRequest) ProtoReflect() protoreflect.Message {
-	mi := &file_ref_proto_msgTypes[37]
+	mi := &file_ref_proto_msgTypes[38]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -2407,7 +2459,7 @@ func (x *PackRefsRequest) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use PackRefsRequest.ProtoReflect.Descriptor instead.
 func (*PackRefsRequest) Descriptor() ([]byte, []int) {
-	return file_ref_proto_rawDescGZIP(), []int{37}
+	return file_ref_proto_rawDescGZIP(), []int{38}
 }
 
 func (x *PackRefsRequest) GetRepository() *Repository {
@@ -2427,7 +2479,7 @@ type PackRefsResponse struct {
 func (x *PackRefsResponse) Reset() {
 	*x = PackRefsResponse{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_ref_proto_msgTypes[38]
+		mi := &file_ref_proto_msgTypes[39]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -2440,7 +2492,7 @@ func (x *PackRefsResponse) String() string {
 func (*PackRefsResponse) ProtoMessage() {}
 
 func (x *PackRefsResponse) ProtoReflect() protoreflect.Message {
-	mi := &file_ref_proto_msgTypes[38]
+	mi := &file_ref_proto_msgTypes[39]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -2453,7 +2505,7 @@ func (x *PackRefsResponse) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use PackRefsResponse.ProtoReflect.Descriptor instead.
 func (*PackRefsResponse) Descriptor() ([]byte, []int) {
-	return file_ref_proto_rawDescGZIP(), []int{38}
+	return file_ref_proto_rawDescGZIP(), []int{39}
 }
 
 // ListRefsRequest is a request for the ListRefs RPC.
@@ -2478,7 +2530,7 @@ type ListRefsRequest struct {
 func (x *ListRefsRequest) Reset() {
 	*x = ListRefsRequest{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_ref_proto_msgTypes[39]
+		mi := &file_ref_proto_msgTypes[40]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -2491,7 +2543,7 @@ func (x *ListRefsRequest) String() string {
 func (*ListRefsRequest) ProtoMessage() {}
 
 func (x *ListRefsRequest) ProtoReflect() protoreflect.Message {
-	mi := &file_ref_proto_msgTypes[39]
+	mi := &file_ref_proto_msgTypes[40]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -2504,7 +2556,7 @@ func (x *ListRefsRequest) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use ListRefsRequest.ProtoReflect.Descriptor instead.
 func (*ListRefsRequest) Descriptor() ([]byte, []int) {
-	return file_ref_proto_rawDescGZIP(), []int{39}
+	return file_ref_proto_rawDescGZIP(), []int{40}
 }
 
 func (x *ListRefsRequest) GetRepository() *Repository {
@@ -2549,7 +2601,7 @@ type ListRefsResponse struct {
 func (x *ListRefsResponse) Reset() {
 	*x = ListRefsResponse{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_ref_proto_msgTypes[40]
+		mi := &file_ref_proto_msgTypes[41]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -2562,7 +2614,7 @@ func (x *ListRefsResponse) String() string {
 func (*ListRefsResponse) ProtoMessage() {}
 
 func (x *ListRefsResponse) ProtoReflect() protoreflect.Message {
-	mi := &file_ref_proto_msgTypes[40]
+	mi := &file_ref_proto_msgTypes[41]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -2575,7 +2627,7 @@ func (x *ListRefsResponse) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use ListRefsResponse.ProtoReflect.Descriptor instead.
 func (*ListRefsResponse) Descriptor() ([]byte, []int) {
-	return file_ref_proto_rawDescGZIP(), []int{40}
+	return file_ref_proto_rawDescGZIP(), []int{41}
 }
 
 func (x *ListRefsResponse) GetReferences() []*ListRefsResponse_Reference {
@@ -2609,7 +2661,7 @@ type FindRefsByOIDRequest struct {
 func (x *FindRefsByOIDRequest) Reset() {
 	*x = FindRefsByOIDRequest{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_ref_proto_msgTypes[41]
+		mi := &file_ref_proto_msgTypes[42]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -2622,7 +2674,7 @@ func (x *FindRefsByOIDRequest) String() string {
 func (*FindRefsByOIDRequest) ProtoMessage() {}
 
 func (x *FindRefsByOIDRequest) ProtoReflect() protoreflect.Message {
-	mi := &file_ref_proto_msgTypes[41]
+	mi := &file_ref_proto_msgTypes[42]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -2635,7 +2687,7 @@ func (x *FindRefsByOIDRequest) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use FindRefsByOIDRequest.ProtoReflect.Descriptor instead.
 func (*FindRefsByOIDRequest) Descriptor() ([]byte, []int) {
-	return file_ref_proto_rawDescGZIP(), []int{41}
+	return file_ref_proto_rawDescGZIP(), []int{42}
 }
 
 func (x *FindRefsByOIDRequest) GetRepository() *Repository {
@@ -2686,7 +2738,7 @@ type FindRefsByOIDResponse struct {
 func (x *FindRefsByOIDResponse) Reset() {
 	*x = FindRefsByOIDResponse{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_ref_proto_msgTypes[42]
+		mi := &file_ref_proto_msgTypes[43]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -2699,7 +2751,7 @@ func (x *FindRefsByOIDResponse) String() string {
 func (*FindRefsByOIDResponse) ProtoMessage() {}
 
 func (x *FindRefsByOIDResponse) ProtoReflect() protoreflect.Message {
-	mi := &file_ref_proto_msgTypes[42]
+	mi := &file_ref_proto_msgTypes[43]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -2712,7 +2764,7 @@ func (x *FindRefsByOIDResponse) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use FindRefsByOIDResponse.ProtoReflect.Descriptor instead.
 func (*FindRefsByOIDResponse) Descriptor() ([]byte, []int) {
-	return file_ref_proto_rawDescGZIP(), []int{42}
+	return file_ref_proto_rawDescGZIP(), []int{43}
 }
 
 func (x *FindRefsByOIDResponse) GetRefs() []string {
@@ -2737,7 +2789,7 @@ type FindAllBranchesResponse_Branch struct {
 func (x *FindAllBranchesResponse_Branch) Reset() {
 	*x = FindAllBranchesResponse_Branch{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_ref_proto_msgTypes[43]
+		mi := &file_ref_proto_msgTypes[44]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -2750,7 +2802,7 @@ func (x *FindAllBranchesResponse_Branch) String() string {
 func (*FindAllBranchesResponse_Branch) ProtoMessage() {}
 
 func (x *FindAllBranchesResponse_Branch) ProtoReflect() protoreflect.Message {
-	mi := &file_ref_proto_msgTypes[43]
+	mi := &file_ref_proto_msgTypes[44]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -2795,7 +2847,7 @@ type FindAllTagsRequest_SortBy struct {
 func (x *FindAllTagsRequest_SortBy) Reset() {
 	*x = FindAllTagsRequest_SortBy{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_ref_proto_msgTypes[44]
+		mi := &file_ref_proto_msgTypes[45]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -2808,7 +2860,7 @@ func (x *FindAllTagsRequest_SortBy) String() string {
 func (*FindAllTagsRequest_SortBy) ProtoMessage() {}
 
 func (x *FindAllTagsRequest_SortBy) ProtoReflect() protoreflect.Message {
-	mi := &file_ref_proto_msgTypes[44]
+	mi := &file_ref_proto_msgTypes[45]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -2821,7 +2873,7 @@ func (x *FindAllTagsRequest_SortBy) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use FindAllTagsRequest_SortBy.ProtoReflect.Descriptor instead.
 func (*FindAllTagsRequest_SortBy) Descriptor() ([]byte, []int) {
-	return file_ref_proto_rawDescGZIP(), []int{14, 0}
+	return file_ref_proto_rawDescGZIP(), []int{15, 0}
 }
 
 func (x *FindAllTagsRequest_SortBy) GetKey() FindAllTagsRequest_SortBy_Key {
@@ -2858,7 +2910,7 @@ type GetTagSignaturesResponse_TagSignature struct {
 func (x *GetTagSignaturesResponse_TagSignature) Reset() {
 	*x = GetTagSignaturesResponse_TagSignature{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_ref_proto_msgTypes[45]
+		mi := &file_ref_proto_msgTypes[46]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -2871,7 +2923,7 @@ func (x *GetTagSignaturesResponse_TagSignature) String() string {
 func (*GetTagSignaturesResponse_TagSignature) ProtoMessage() {}
 
 func (x *GetTagSignaturesResponse_TagSignature) ProtoReflect() protoreflect.Message {
-	mi := &file_ref_proto_msgTypes[45]
+	mi := &file_ref_proto_msgTypes[46]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -2884,7 +2936,7 @@ func (x *GetTagSignaturesResponse_TagSignature) ProtoReflect() protoreflect.Mess
 
 // Deprecated: Use GetTagSignaturesResponse_TagSignature.ProtoReflect.Descriptor instead.
 func (*GetTagSignaturesResponse_TagSignature) Descriptor() ([]byte, []int) {
-	return file_ref_proto_rawDescGZIP(), []int{32, 0}
+	return file_ref_proto_rawDescGZIP(), []int{33, 0}
 }
 
 func (x *GetTagSignaturesResponse_TagSignature) GetTagId() string {
@@ -2923,7 +2975,7 @@ type ListRefsRequest_SortBy struct {
 func (x *ListRefsRequest_SortBy) Reset() {
 	*x = ListRefsRequest_SortBy{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_ref_proto_msgTypes[46]
+		mi := &file_ref_proto_msgTypes[47]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -2936,7 +2988,7 @@ func (x *ListRefsRequest_SortBy) String() string {
 func (*ListRefsRequest_SortBy) ProtoMessage() {}
 
 func (x *ListRefsRequest_SortBy) ProtoReflect() protoreflect.Message {
-	mi := &file_ref_proto_msgTypes[46]
+	mi := &file_ref_proto_msgTypes[47]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -2949,7 +3001,7 @@ func (x *ListRefsRequest_SortBy) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use ListRefsRequest_SortBy.ProtoReflect.Descriptor instead.
 func (*ListRefsRequest_SortBy) Descriptor() ([]byte, []int) {
-	return file_ref_proto_rawDescGZIP(), []int{39, 0}
+	return file_ref_proto_rawDescGZIP(), []int{40, 0}
 }
 
 func (x *ListRefsRequest_SortBy) GetKey() ListRefsRequest_SortBy_Key {
@@ -2981,7 +3033,7 @@ type ListRefsResponse_Reference struct {
 func (x *ListRefsResponse_Reference) Reset() {
 	*x = ListRefsResponse_Reference{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_ref_proto_msgTypes[47]
+		mi := &file_ref_proto_msgTypes[48]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -2994,7 +3046,7 @@ func (x *ListRefsResponse_Reference) String() string {
 func (*ListRefsResponse_Reference) ProtoMessage() {}
 
 func (x *ListRefsResponse_Reference) ProtoReflect() protoreflect.Message {
-	mi := &file_ref_proto_msgTypes[47]
+	mi := &file_ref_proto_msgTypes[48]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -3007,7 +3059,7 @@ func (x *ListRefsResponse_Reference) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use ListRefsResponse_Reference.ProtoReflect.Descriptor instead.
 func (*ListRefsResponse_Reference) Descriptor() ([]byte, []int) {
-	return file_ref_proto_rawDescGZIP(), []int{40, 0}
+	return file_ref_proto_rawDescGZIP(), []int{41, 0}
 }
 
 func (x *ListRefsResponse_Reference) GetName() []byte {
@@ -3141,344 +3193,349 @@ var file_ref_proto_rawDesc = []byte{
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 }
 
 var (
@@ -3494,7 +3551,7 @@ func file_ref_proto_rawDescGZIP() []byte {
 }
 
 var file_ref_proto_enumTypes = make([]protoimpl.EnumInfo, 4)
-var file_ref_proto_msgTypes = make([]protoimpl.MessageInfo, 48)
+var file_ref_proto_msgTypes = make([]protoimpl.MessageInfo, 49)
 var file_ref_proto_goTypes = []interface{}{
 	(FindLocalBranchesRequest_SortBy)(0),            // 0: gitaly.FindLocalBranchesRequest.SortBy
 	(FindAllTagsRequest_SortBy_Key)(0),              // 1: gitaly.FindAllTagsRequest.SortBy.Key
@@ -3514,138 +3571,141 @@ var file_ref_proto_goTypes = []interface{}{
 	(*FindAllBranchesResponse)(nil),                 // 15: gitaly.FindAllBranchesResponse
 	(*FindTagRequest)(nil),                          // 16: gitaly.FindTagRequest
 	(*FindTagResponse)(nil),                         // 17: gitaly.FindTagResponse
-	(*FindAllTagsRequest)(nil),                      // 18: gitaly.FindAllTagsRequest
-	(*FindAllTagsResponse)(nil),                     // 19: gitaly.FindAllTagsResponse
-	(*RefExistsRequest)(nil),                        // 20: gitaly.RefExistsRequest
-	(*RefExistsResponse)(nil),                       // 21: gitaly.RefExistsResponse
-	(*CreateBranchRequest)(nil),                     // 22: gitaly.CreateBranchRequest
-	(*CreateBranchResponse)(nil),                    // 23: gitaly.CreateBranchResponse
-	(*DeleteBranchRequest)(nil),                     // 24: gitaly.DeleteBranchRequest
-	(*DeleteBranchResponse)(nil),                    // 25: gitaly.DeleteBranchResponse
-	(*FindBranchRequest)(nil),                       // 26: gitaly.FindBranchRequest
-	(*FindBranchResponse)(nil),                      // 27: gitaly.FindBranchResponse
-	(*DeleteRefsRequest)(nil),                       // 28: gitaly.DeleteRefsRequest
-	(*DeleteRefsResponse)(nil),                      // 29: gitaly.DeleteRefsResponse
-	(*DeleteRefsError)(nil),                         // 30: gitaly.DeleteRefsError
-	(*ListBranchNamesContainingCommitRequest)(nil),  // 31: gitaly.ListBranchNamesContainingCommitRequest
-	(*ListBranchNamesContainingCommitResponse)(nil), // 32: gitaly.ListBranchNamesContainingCommitResponse
-	(*ListTagNamesContainingCommitRequest)(nil),     // 33: gitaly.ListTagNamesContainingCommitRequest
-	(*ListTagNamesContainingCommitResponse)(nil),    // 34: gitaly.ListTagNamesContainingCommitResponse
-	(*GetTagSignaturesRequest)(nil),                 // 35: gitaly.GetTagSignaturesRequest
-	(*GetTagSignaturesResponse)(nil),                // 36: gitaly.GetTagSignaturesResponse
-	(*GetTagMessagesRequest)(nil),                   // 37: gitaly.GetTagMessagesRequest
-	(*GetTagMessagesResponse)(nil),                  // 38: gitaly.GetTagMessagesResponse
-	(*FindAllRemoteBranchesRequest)(nil),            // 39: gitaly.FindAllRemoteBranchesRequest
-	(*FindAllRemoteBranchesResponse)(nil),           // 40: gitaly.FindAllRemoteBranchesResponse
-	(*PackRefsRequest)(nil),                         // 41: gitaly.PackRefsRequest
-	(*PackRefsResponse)(nil),                        // 42: gitaly.PackRefsResponse
-	(*ListRefsRequest)(nil),                         // 43: gitaly.ListRefsRequest
-	(*ListRefsResponse)(nil),                        // 44: gitaly.ListRefsResponse
-	(*FindRefsByOIDRequest)(nil),                    // 45: gitaly.FindRefsByOIDRequest
-	(*FindRefsByOIDResponse)(nil),                   // 46: gitaly.FindRefsByOIDResponse
-	(*FindAllBranchesResponse_Branch)(nil),          // 47: gitaly.FindAllBranchesResponse.Branch
-	(*FindAllTagsRequest_SortBy)(nil),               // 48: gitaly.FindAllTagsRequest.SortBy
-	(*GetTagSignaturesResponse_TagSignature)(nil),   // 49: gitaly.GetTagSignaturesResponse.TagSignature
-	(*ListRefsRequest_SortBy)(nil),                  // 50: gitaly.ListRefsRequest.SortBy
-	(*ListRefsResponse_Reference)(nil),              // 51: gitaly.ListRefsResponse.Reference
-	(*Repository)(nil),                              // 52: gitaly.Repository
-	(*PaginationParameter)(nil),                     // 53: gitaly.PaginationParameter
-	(*GitCommit)(nil),                               // 54: gitaly.GitCommit
-	(*timestamppb.Timestamp)(nil),                   // 55: google.protobuf.Timestamp
-	(*Tag)(nil),                                     // 56: gitaly.Tag
-	(*Branch)(nil),                                  // 57: gitaly.Branch
-	(*InvalidRefFormatError)(nil),                   // 58: gitaly.InvalidRefFormatError
-	(*ReferencesLockedError)(nil),                   // 59: gitaly.ReferencesLockedError
-	(SortDirection)(0),                              // 60: gitaly.SortDirection
+	(*FindTagError)(nil),                            // 18: gitaly.FindTagError
+	(*FindAllTagsRequest)(nil),                      // 19: gitaly.FindAllTagsRequest
+	(*FindAllTagsResponse)(nil),                     // 20: gitaly.FindAllTagsResponse
+	(*RefExistsRequest)(nil),                        // 21: gitaly.RefExistsRequest
+	(*RefExistsResponse)(nil),                       // 22: gitaly.RefExistsResponse
+	(*CreateBranchRequest)(nil),                     // 23: gitaly.CreateBranchRequest
+	(*CreateBranchResponse)(nil),                    // 24: gitaly.CreateBranchResponse
+	(*DeleteBranchRequest)(nil),                     // 25: gitaly.DeleteBranchRequest
+	(*DeleteBranchResponse)(nil),                    // 26: gitaly.DeleteBranchResponse
+	(*FindBranchRequest)(nil),                       // 27: gitaly.FindBranchRequest
+	(*FindBranchResponse)(nil),                      // 28: gitaly.FindBranchResponse
+	(*DeleteRefsRequest)(nil),                       // 29: gitaly.DeleteRefsRequest
+	(*DeleteRefsResponse)(nil),                      // 30: gitaly.DeleteRefsResponse
+	(*DeleteRefsError)(nil),                         // 31: gitaly.DeleteRefsError
+	(*ListBranchNamesContainingCommitRequest)(nil),  // 32: gitaly.ListBranchNamesContainingCommitRequest
+	(*ListBranchNamesContainingCommitResponse)(nil), // 33: gitaly.ListBranchNamesContainingCommitResponse
+	(*ListTagNamesContainingCommitRequest)(nil),     // 34: gitaly.ListTagNamesContainingCommitRequest
+	(*ListTagNamesContainingCommitResponse)(nil),    // 35: gitaly.ListTagNamesContainingCommitResponse
+	(*GetTagSignaturesRequest)(nil),                 // 36: gitaly.GetTagSignaturesRequest
+	(*GetTagSignaturesResponse)(nil),                // 37: gitaly.GetTagSignaturesResponse
+	(*GetTagMessagesRequest)(nil),                   // 38: gitaly.GetTagMessagesRequest
+	(*GetTagMessagesResponse)(nil),                  // 39: gitaly.GetTagMessagesResponse
+	(*FindAllRemoteBranchesRequest)(nil),            // 40: gitaly.FindAllRemoteBranchesRequest
+	(*FindAllRemoteBranchesResponse)(nil),           // 41: gitaly.FindAllRemoteBranchesResponse
+	(*PackRefsRequest)(nil),                         // 42: gitaly.PackRefsRequest
+	(*PackRefsResponse)(nil),                        // 43: gitaly.PackRefsResponse
+	(*ListRefsRequest)(nil),                         // 44: gitaly.ListRefsRequest
+	(*ListRefsResponse)(nil),                        // 45: gitaly.ListRefsResponse
+	(*FindRefsByOIDRequest)(nil),                    // 46: gitaly.FindRefsByOIDRequest
+	(*FindRefsByOIDResponse)(nil),                   // 47: gitaly.FindRefsByOIDResponse
+	(*FindAllBranchesResponse_Branch)(nil),          // 48: gitaly.FindAllBranchesResponse.Branch
+	(*FindAllTagsRequest_SortBy)(nil),               // 49: gitaly.FindAllTagsRequest.SortBy
+	(*GetTagSignaturesResponse_TagSignature)(nil),   // 50: gitaly.GetTagSignaturesResponse.TagSignature
+	(*ListRefsRequest_SortBy)(nil),                  // 51: gitaly.ListRefsRequest.SortBy
+	(*ListRefsResponse_Reference)(nil),              // 52: gitaly.ListRefsResponse.Reference
+	(*Repository)(nil),                              // 53: gitaly.Repository
+	(*PaginationParameter)(nil),                     // 54: gitaly.PaginationParameter
+	(*GitCommit)(nil),                               // 55: gitaly.GitCommit
+	(*timestamppb.Timestamp)(nil),                   // 56: google.protobuf.Timestamp
+	(*Tag)(nil),                                     // 57: gitaly.Tag
+	(*ReferenceNotFoundError)(nil),                  // 58: gitaly.ReferenceNotFoundError
+	(*Branch)(nil),                                  // 59: gitaly.Branch
+	(*InvalidRefFormatError)(nil),                   // 60: gitaly.InvalidRefFormatError
+	(*ReferencesLockedError)(nil),                   // 61: gitaly.ReferencesLockedError
+	(SortDirection)(0),                              // 62: gitaly.SortDirection
 }
 var file_ref_proto_depIdxs = []int32{
-	52, // 0: gitaly.FindDefaultBranchNameRequest.repository:type_name -> gitaly.Repository
-	52, // 1: gitaly.FindAllBranchNamesRequest.repository:type_name -> gitaly.Repository
-	52, // 2: gitaly.FindAllTagNamesRequest.repository:type_name -> gitaly.Repository
-	52, // 3: gitaly.FindLocalBranchesRequest.repository:type_name -> gitaly.Repository
+	53, // 0: gitaly.FindDefaultBranchNameRequest.repository:type_name -> gitaly.Repository
+	53, // 1: gitaly.FindAllBranchNamesRequest.repository:type_name -> gitaly.Repository
+	53, // 2: gitaly.FindAllTagNamesRequest.repository:type_name -> gitaly.Repository
+	53, // 3: gitaly.FindLocalBranchesRequest.repository:type_name -> gitaly.Repository
 	0,  // 4: gitaly.FindLocalBranchesRequest.sort_by:type_name -> gitaly.FindLocalBranchesRequest.SortBy
-	53, // 5: gitaly.FindLocalBranchesRequest.pagination_params:type_name -> gitaly.PaginationParameter
+	54, // 5: gitaly.FindLocalBranchesRequest.pagination_params:type_name -> gitaly.PaginationParameter
 	12, // 6: gitaly.FindLocalBranchesResponse.branches:type_name -> gitaly.FindLocalBranchResponse
 	13, // 7: gitaly.FindLocalBranchResponse.commit_author:type_name -> gitaly.FindLocalBranchCommitAuthor
 	13, // 8: gitaly.FindLocalBranchResponse.commit_committer:type_name -> gitaly.FindLocalBranchCommitAuthor
-	54, // 9: gitaly.FindLocalBranchResponse.commit:type_name -> gitaly.GitCommit
-	55, // 10: gitaly.FindLocalBranchCommitAuthor.date:type_name -> google.protobuf.Timestamp
-	52, // 11: gitaly.FindAllBranchesRequest.repository:type_name -> gitaly.Repository
-	47, // 12: gitaly.FindAllBranchesResponse.branches:type_name -> gitaly.FindAllBranchesResponse.Branch
-	52, // 13: gitaly.FindTagRequest.repository:type_name -> gitaly.Repository
-	56, // 14: gitaly.FindTagResponse.tag:type_name -> gitaly.Tag
-	52, // 15: gitaly.FindAllTagsRequest.repository:type_name -> gitaly.Repository
-	48, // 16: gitaly.FindAllTagsRequest.sort_by:type_name -> gitaly.FindAllTagsRequest.SortBy
-	53, // 17: gitaly.FindAllTagsRequest.pagination_params:type_name -> gitaly.PaginationParameter
-	56, // 18: gitaly.FindAllTagsResponse.tags:type_name -> gitaly.Tag
-	52, // 19: gitaly.RefExistsRequest.repository:type_name -> gitaly.Repository
-	52, // 20: gitaly.CreateBranchRequest.repository:type_name -> gitaly.Repository
-	2,  // 21: gitaly.CreateBranchResponse.status:type_name -> gitaly.CreateBranchResponse.Status
-	57, // 22: gitaly.CreateBranchResponse.branch:type_name -> gitaly.Branch
-	52, // 23: gitaly.DeleteBranchRequest.repository:type_name -> gitaly.Repository
-	52, // 24: gitaly.FindBranchRequest.repository:type_name -> gitaly.Repository
-	57, // 25: gitaly.FindBranchResponse.branch:type_name -> gitaly.Branch
-	52, // 26: gitaly.DeleteRefsRequest.repository:type_name -> gitaly.Repository
-	58, // 27: gitaly.DeleteRefsError.invalid_format:type_name -> gitaly.InvalidRefFormatError
-	59, // 28: gitaly.DeleteRefsError.references_locked:type_name -> gitaly.ReferencesLockedError
-	52, // 29: gitaly.ListBranchNamesContainingCommitRequest.repository:type_name -> gitaly.Repository
-	52, // 30: gitaly.ListTagNamesContainingCommitRequest.repository:type_name -> gitaly.Repository
-	52, // 31: gitaly.GetTagSignaturesRequest.repository:type_name -> gitaly.Repository
-	49, // 32: gitaly.GetTagSignaturesResponse.signatures:type_name -> gitaly.GetTagSignaturesResponse.TagSignature
-	52, // 33: gitaly.GetTagMessagesRequest.repository:type_name -> gitaly.Repository
-	52, // 34: gitaly.FindAllRemoteBranchesRequest.repository:type_name -> gitaly.Repository
-	57, // 35: gitaly.FindAllRemoteBranchesResponse.branches:type_name -> gitaly.Branch
-	52, // 36: gitaly.PackRefsRequest.repository:type_name -> gitaly.Repository
-	52, // 37: gitaly.ListRefsRequest.repository:type_name -> gitaly.Repository
-	50, // 38: gitaly.ListRefsRequest.sort_by:type_name -> gitaly.ListRefsRequest.SortBy
-	51, // 39: gitaly.ListRefsResponse.references:type_name -> gitaly.ListRefsResponse.Reference
-	52, // 40: gitaly.FindRefsByOIDRequest.repository:type_name -> gitaly.Repository
-	54, // 41: gitaly.FindAllBranchesResponse.Branch.target:type_name -> gitaly.GitCommit
-	1,  // 42: gitaly.FindAllTagsRequest.SortBy.key:type_name -> gitaly.FindAllTagsRequest.SortBy.Key
-	60, // 43: gitaly.FindAllTagsRequest.SortBy.direction:type_name -> gitaly.SortDirection
-	3,  // 44: gitaly.ListRefsRequest.SortBy.key:type_name -> gitaly.ListRefsRequest.SortBy.Key
-	60, // 45: gitaly.ListRefsRequest.SortBy.direction:type_name -> gitaly.SortDirection
-	4,  // 46: gitaly.RefService.FindDefaultBranchName:input_type -> gitaly.FindDefaultBranchNameRequest
-	6,  // 47: gitaly.RefService.FindAllBranchNames:input_type -> gitaly.FindAllBranchNamesRequest
-	8,  // 48: gitaly.RefService.FindAllTagNames:input_type -> gitaly.FindAllTagNamesRequest
-	10, // 49: gitaly.RefService.FindLocalBranches:input_type -> gitaly.FindLocalBranchesRequest
-	14, // 50: gitaly.RefService.FindAllBranches:input_type -> gitaly.FindAllBranchesRequest
-	18, // 51: gitaly.RefService.FindAllTags:input_type -> gitaly.FindAllTagsRequest
-	16, // 52: gitaly.RefService.FindTag:input_type -> gitaly.FindTagRequest
-	39, // 53: gitaly.RefService.FindAllRemoteBranches:input_type -> gitaly.FindAllRemoteBranchesRequest
-	20, // 54: gitaly.RefService.RefExists:input_type -> gitaly.RefExistsRequest
-	26, // 55: gitaly.RefService.FindBranch:input_type -> gitaly.FindBranchRequest
-	28, // 56: gitaly.RefService.DeleteRefs:input_type -> gitaly.DeleteRefsRequest
-	31, // 57: gitaly.RefService.ListBranchNamesContainingCommit:input_type -> gitaly.ListBranchNamesContainingCommitRequest
-	33, // 58: gitaly.RefService.ListTagNamesContainingCommit:input_type -> gitaly.ListTagNamesContainingCommitRequest
-	35, // 59: gitaly.RefService.GetTagSignatures:input_type -> gitaly.GetTagSignaturesRequest
-	37, // 60: gitaly.RefService.GetTagMessages:input_type -> gitaly.GetTagMessagesRequest
-	41, // 61: gitaly.RefService.PackRefs:input_type -> gitaly.PackRefsRequest
-	43, // 62: gitaly.RefService.ListRefs:input_type -> gitaly.ListRefsRequest
-	45, // 63: gitaly.RefService.FindRefsByOID:input_type -> gitaly.FindRefsByOIDRequest
-	5,  // 64: gitaly.RefService.FindDefaultBranchName:output_type -> gitaly.FindDefaultBranchNameResponse
-	7,  // 65: gitaly.RefService.FindAllBranchNames:output_type -> gitaly.FindAllBranchNamesResponse
-	9,  // 66: gitaly.RefService.FindAllTagNames:output_type -> gitaly.FindAllTagNamesResponse
-	11, // 67: gitaly.RefService.FindLocalBranches:output_type -> gitaly.FindLocalBranchesResponse
-	15, // 68: gitaly.RefService.FindAllBranches:output_type -> gitaly.FindAllBranchesResponse
-	19, // 69: gitaly.RefService.FindAllTags:output_type -> gitaly.FindAllTagsResponse
-	17, // 70: gitaly.RefService.FindTag:output_type -> gitaly.FindTagResponse
-	40, // 71: gitaly.RefService.FindAllRemoteBranches:output_type -> gitaly.FindAllRemoteBranchesResponse
-	21, // 72: gitaly.RefService.RefExists:output_type -> gitaly.RefExistsResponse
-	27, // 73: gitaly.RefService.FindBranch:output_type -> gitaly.FindBranchResponse
-	29, // 74: gitaly.RefService.DeleteRefs:output_type -> gitaly.DeleteRefsResponse
-	32, // 75: gitaly.RefService.ListBranchNamesContainingCommit:output_type -> gitaly.ListBranchNamesContainingCommitResponse
-	34, // 76: gitaly.RefService.ListTagNamesContainingCommit:output_type -> gitaly.ListTagNamesContainingCommitResponse
-	36, // 77: gitaly.RefService.GetTagSignatures:output_type -> gitaly.GetTagSignaturesResponse
-	38, // 78: gitaly.RefService.GetTagMessages:output_type -> gitaly.GetTagMessagesResponse
-	42, // 79: gitaly.RefService.PackRefs:output_type -> gitaly.PackRefsResponse
-	44, // 80: gitaly.RefService.ListRefs:output_type -> gitaly.ListRefsResponse
-	46, // 81: gitaly.RefService.FindRefsByOID:output_type -> gitaly.FindRefsByOIDResponse
-	64, // [64:82] is the sub-list for method output_type
-	46, // [46:64] is the sub-list for method input_type
-	46, // [46:46] is the sub-list for extension type_name
-	46, // [46:46] is the sub-list for extension extendee
-	0,  // [0:46] is the sub-list for field type_name
+	55, // 9: gitaly.FindLocalBranchResponse.commit:type_name -> gitaly.GitCommit
+	56, // 10: gitaly.FindLocalBranchCommitAuthor.date:type_name -> google.protobuf.Timestamp
+	53, // 11: gitaly.FindAllBranchesRequest.repository:type_name -> gitaly.Repository
+	48, // 12: gitaly.FindAllBranchesResponse.branches:type_name -> gitaly.FindAllBranchesResponse.Branch
+	53, // 13: gitaly.FindTagRequest.repository:type_name -> gitaly.Repository
+	57, // 14: gitaly.FindTagResponse.tag:type_name -> gitaly.Tag
+	58, // 15: gitaly.FindTagError.tag_not_found:type_name -> gitaly.ReferenceNotFoundError
+	53, // 16: gitaly.FindAllTagsRequest.repository:type_name -> gitaly.Repository
+	49, // 17: gitaly.FindAllTagsRequest.sort_by:type_name -> gitaly.FindAllTagsRequest.SortBy
+	54, // 18: gitaly.FindAllTagsRequest.pagination_params:type_name -> gitaly.PaginationParameter
+	57, // 19: gitaly.FindAllTagsResponse.tags:type_name -> gitaly.Tag
+	53, // 20: gitaly.RefExistsRequest.repository:type_name -> gitaly.Repository
+	53, // 21: gitaly.CreateBranchRequest.repository:type_name -> gitaly.Repository
+	2,  // 22: gitaly.CreateBranchResponse.status:type_name -> gitaly.CreateBranchResponse.Status
+	59, // 23: gitaly.CreateBranchResponse.branch:type_name -> gitaly.Branch
+	53, // 24: gitaly.DeleteBranchRequest.repository:type_name -> gitaly.Repository
+	53, // 25: gitaly.FindBranchRequest.repository:type_name -> gitaly.Repository
+	59, // 26: gitaly.FindBranchResponse.branch:type_name -> gitaly.Branch
+	53, // 27: gitaly.DeleteRefsRequest.repository:type_name -> gitaly.Repository
+	60, // 28: gitaly.DeleteRefsError.invalid_format:type_name -> gitaly.InvalidRefFormatError
+	61, // 29: gitaly.DeleteRefsError.references_locked:type_name -> gitaly.ReferencesLockedError
+	53, // 30: gitaly.ListBranchNamesContainingCommitRequest.repository:type_name -> gitaly.Repository
+	53, // 31: gitaly.ListTagNamesContainingCommitRequest.repository:type_name -> gitaly.Repository
+	53, // 32: gitaly.GetTagSignaturesRequest.repository:type_name -> gitaly.Repository
+	50, // 33: gitaly.GetTagSignaturesResponse.signatures:type_name -> gitaly.GetTagSignaturesResponse.TagSignature
+	53, // 34: gitaly.GetTagMessagesRequest.repository:type_name -> gitaly.Repository
+	53, // 35: gitaly.FindAllRemoteBranchesRequest.repository:type_name -> gitaly.Repository
+	59, // 36: gitaly.FindAllRemoteBranchesResponse.branches:type_name -> gitaly.Branch
+	53, // 37: gitaly.PackRefsRequest.repository:type_name -> gitaly.Repository
+	53, // 38: gitaly.ListRefsRequest.repository:type_name -> gitaly.Repository
+	51, // 39: gitaly.ListRefsRequest.sort_by:type_name -> gitaly.ListRefsRequest.SortBy
+	52, // 40: gitaly.ListRefsResponse.references:type_name -> gitaly.ListRefsResponse.Reference
+	53, // 41: gitaly.FindRefsByOIDRequest.repository:type_name -> gitaly.Repository
+	55, // 42: gitaly.FindAllBranchesResponse.Branch.target:type_name -> gitaly.GitCommit
+	1,  // 43: gitaly.FindAllTagsRequest.SortBy.key:type_name -> gitaly.FindAllTagsRequest.SortBy.Key
+	62, // 44: gitaly.FindAllTagsRequest.SortBy.direction:type_name -> gitaly.SortDirection
+	3,  // 45: gitaly.ListRefsRequest.SortBy.key:type_name -> gitaly.ListRefsRequest.SortBy.Key
+	62, // 46: gitaly.ListRefsRequest.SortBy.direction:type_name -> gitaly.SortDirection
+	4,  // 47: gitaly.RefService.FindDefaultBranchName:input_type -> gitaly.FindDefaultBranchNameRequest
+	6,  // 48: gitaly.RefService.FindAllBranchNames:input_type -> gitaly.FindAllBranchNamesRequest
+	8,  // 49: gitaly.RefService.FindAllTagNames:input_type -> gitaly.FindAllTagNamesRequest
+	10, // 50: gitaly.RefService.FindLocalBranches:input_type -> gitaly.FindLocalBranchesRequest
+	14, // 51: gitaly.RefService.FindAllBranches:input_type -> gitaly.FindAllBranchesRequest
+	19, // 52: gitaly.RefService.FindAllTags:input_type -> gitaly.FindAllTagsRequest
+	16, // 53: gitaly.RefService.FindTag:input_type -> gitaly.FindTagRequest
+	40, // 54: gitaly.RefService.FindAllRemoteBranches:input_type -> gitaly.FindAllRemoteBranchesRequest
+	21, // 55: gitaly.RefService.RefExists:input_type -> gitaly.RefExistsRequest
+	27, // 56: gitaly.RefService.FindBranch:input_type -> gitaly.FindBranchRequest
+	29, // 57: gitaly.RefService.DeleteRefs:input_type -> gitaly.DeleteRefsRequest
+	32, // 58: gitaly.RefService.ListBranchNamesContainingCommit:input_type -> gitaly.ListBranchNamesContainingCommitRequest
+	34, // 59: gitaly.RefService.ListTagNamesContainingCommit:input_type -> gitaly.ListTagNamesContainingCommitRequest
+	36, // 60: gitaly.RefService.GetTagSignatures:input_type -> gitaly.GetTagSignaturesRequest
+	38, // 61: gitaly.RefService.GetTagMessages:input_type -> gitaly.GetTagMessagesRequest
+	42, // 62: gitaly.RefService.PackRefs:input_type -> gitaly.PackRefsRequest
+	44, // 63: gitaly.RefService.ListRefs:input_type -> gitaly.ListRefsRequest
+	46, // 64: gitaly.RefService.FindRefsByOID:input_type -> gitaly.FindRefsByOIDRequest
+	5,  // 65: gitaly.RefService.FindDefaultBranchName:output_type -> gitaly.FindDefaultBranchNameResponse
+	7,  // 66: gitaly.RefService.FindAllBranchNames:output_type -> gitaly.FindAllBranchNamesResponse
+	9,  // 67: gitaly.RefService.FindAllTagNames:output_type -> gitaly.FindAllTagNamesResponse
+	11, // 68: gitaly.RefService.FindLocalBranches:output_type -> gitaly.FindLocalBranchesResponse
+	15, // 69: gitaly.RefService.FindAllBranches:output_type -> gitaly.FindAllBranchesResponse
+	20, // 70: gitaly.RefService.FindAllTags:output_type -> gitaly.FindAllTagsResponse
+	17, // 71: gitaly.RefService.FindTag:output_type -> gitaly.FindTagResponse
+	41, // 72: gitaly.RefService.FindAllRemoteBranches:output_type -> gitaly.FindAllRemoteBranchesResponse
+	22, // 73: gitaly.RefService.RefExists:output_type -> gitaly.RefExistsResponse
+	28, // 74: gitaly.RefService.FindBranch:output_type -> gitaly.FindBranchResponse
+	30, // 75: gitaly.RefService.DeleteRefs:output_type -> gitaly.DeleteRefsResponse
+	33, // 76: gitaly.RefService.ListBranchNamesContainingCommit:output_type -> gitaly.ListBranchNamesContainingCommitResponse
+	35, // 77: gitaly.RefService.ListTagNamesContainingCommit:output_type -> gitaly.ListTagNamesContainingCommitResponse
+	37, // 78: gitaly.RefService.GetTagSignatures:output_type -> gitaly.GetTagSignaturesResponse
+	39, // 79: gitaly.RefService.GetTagMessages:output_type -> gitaly.GetTagMessagesResponse
+	43, // 80: gitaly.RefService.PackRefs:output_type -> gitaly.PackRefsResponse
+	45, // 81: gitaly.RefService.ListRefs:output_type -> gitaly.ListRefsResponse
+	47, // 82: gitaly.RefService.FindRefsByOID:output_type -> gitaly.FindRefsByOIDResponse
+	65, // [65:83] is the sub-list for method output_type
+	47, // [47:65] is the sub-list for method input_type
+	47, // [47:47] is the sub-list for extension type_name
+	47, // [47:47] is the sub-list for extension extendee
+	0,  // [0:47] is the sub-list for field type_name
 }
 
 func init() { file_ref_proto_init() }
@@ -3826,7 +3886,7 @@ func file_ref_proto_init() {
 			}
 		}
 		file_ref_proto_msgTypes[14].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*FindAllTagsRequest); i {
+			switch v := v.(*FindTagError); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -3838,7 +3898,7 @@ func file_ref_proto_init() {
 			}
 		}
 		file_ref_proto_msgTypes[15].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*FindAllTagsResponse); i {
+			switch v := v.(*FindAllTagsRequest); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -3850,7 +3910,7 @@ func file_ref_proto_init() {
 			}
 		}
 		file_ref_proto_msgTypes[16].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*RefExistsRequest); i {
+			switch v := v.(*FindAllTagsResponse); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -3862,7 +3922,7 @@ func file_ref_proto_init() {
 			}
 		}
 		file_ref_proto_msgTypes[17].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*RefExistsResponse); i {
+			switch v := v.(*RefExistsRequest); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -3874,7 +3934,7 @@ func file_ref_proto_init() {
 			}
 		}
 		file_ref_proto_msgTypes[18].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*CreateBranchRequest); i {
+			switch v := v.(*RefExistsResponse); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -3886,7 +3946,7 @@ func file_ref_proto_init() {
 			}
 		}
 		file_ref_proto_msgTypes[19].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*CreateBranchResponse); i {
+			switch v := v.(*CreateBranchRequest); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -3898,7 +3958,7 @@ func file_ref_proto_init() {
 			}
 		}
 		file_ref_proto_msgTypes[20].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*DeleteBranchRequest); i {
+			switch v := v.(*CreateBranchResponse); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -3910,7 +3970,7 @@ func file_ref_proto_init() {
 			}
 		}
 		file_ref_proto_msgTypes[21].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*DeleteBranchResponse); i {
+			switch v := v.(*DeleteBranchRequest); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -3922,7 +3982,7 @@ func file_ref_proto_init() {
 			}
 		}
 		file_ref_proto_msgTypes[22].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*FindBranchRequest); i {
+			switch v := v.(*DeleteBranchResponse); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -3934,7 +3994,7 @@ func file_ref_proto_init() {
 			}
 		}
 		file_ref_proto_msgTypes[23].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*FindBranchResponse); i {
+			switch v := v.(*FindBranchRequest); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -3946,7 +4006,7 @@ func file_ref_proto_init() {
 			}
 		}
 		file_ref_proto_msgTypes[24].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*DeleteRefsRequest); i {
+			switch v := v.(*FindBranchResponse); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -3958,7 +4018,7 @@ func file_ref_proto_init() {
 			}
 		}
 		file_ref_proto_msgTypes[25].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*DeleteRefsResponse); i {
+			switch v := v.(*DeleteRefsRequest); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -3970,7 +4030,7 @@ func file_ref_proto_init() {
 			}
 		}
 		file_ref_proto_msgTypes[26].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*DeleteRefsError); i {
+			switch v := v.(*DeleteRefsResponse); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -3982,7 +4042,7 @@ func file_ref_proto_init() {
 			}
 		}
 		file_ref_proto_msgTypes[27].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*ListBranchNamesContainingCommitRequest); i {
+			switch v := v.(*DeleteRefsError); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -3994,7 +4054,7 @@ func file_ref_proto_init() {
 			}
 		}
 		file_ref_proto_msgTypes[28].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*ListBranchNamesContainingCommitResponse); i {
+			switch v := v.(*ListBranchNamesContainingCommitRequest); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -4006,7 +4066,7 @@ func file_ref_proto_init() {
 			}
 		}
 		file_ref_proto_msgTypes[29].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*ListTagNamesContainingCommitRequest); i {
+			switch v := v.(*ListBranchNamesContainingCommitResponse); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -4018,7 +4078,7 @@ func file_ref_proto_init() {
 			}
 		}
 		file_ref_proto_msgTypes[30].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*ListTagNamesContainingCommitResponse); i {
+			switch v := v.(*ListTagNamesContainingCommitRequest); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -4030,7 +4090,7 @@ func file_ref_proto_init() {
 			}
 		}
 		file_ref_proto_msgTypes[31].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*GetTagSignaturesRequest); i {
+			switch v := v.(*ListTagNamesContainingCommitResponse); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -4042,7 +4102,7 @@ func file_ref_proto_init() {
 			}
 		}
 		file_ref_proto_msgTypes[32].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*GetTagSignaturesResponse); i {
+			switch v := v.(*GetTagSignaturesRequest); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -4054,7 +4114,7 @@ func file_ref_proto_init() {
 			}
 		}
 		file_ref_proto_msgTypes[33].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*GetTagMessagesRequest); i {
+			switch v := v.(*GetTagSignaturesResponse); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -4066,7 +4126,7 @@ func file_ref_proto_init() {
 			}
 		}
 		file_ref_proto_msgTypes[34].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*GetTagMessagesResponse); i {
+			switch v := v.(*GetTagMessagesRequest); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -4078,7 +4138,7 @@ func file_ref_proto_init() {
 			}
 		}
 		file_ref_proto_msgTypes[35].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*FindAllRemoteBranchesRequest); i {
+			switch v := v.(*GetTagMessagesResponse); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -4090,7 +4150,7 @@ func file_ref_proto_init() {
 			}
 		}
 		file_ref_proto_msgTypes[36].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*FindAllRemoteBranchesResponse); i {
+			switch v := v.(*FindAllRemoteBranchesRequest); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -4102,7 +4162,7 @@ func file_ref_proto_init() {
 			}
 		}
 		file_ref_proto_msgTypes[37].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*PackRefsRequest); i {
+			switch v := v.(*FindAllRemoteBranchesResponse); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -4114,7 +4174,7 @@ func file_ref_proto_init() {
 			}
 		}
 		file_ref_proto_msgTypes[38].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*PackRefsResponse); i {
+			switch v := v.(*PackRefsRequest); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -4126,7 +4186,7 @@ func file_ref_proto_init() {
 			}
 		}
 		file_ref_proto_msgTypes[39].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*ListRefsRequest); i {
+			switch v := v.(*PackRefsResponse); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -4138,7 +4198,7 @@ func file_ref_proto_init() {
 			}
 		}
 		file_ref_proto_msgTypes[40].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*ListRefsResponse); i {
+			switch v := v.(*ListRefsRequest); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -4150,7 +4210,7 @@ func file_ref_proto_init() {
 			}
 		}
 		file_ref_proto_msgTypes[41].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*FindRefsByOIDRequest); i {
+			switch v := v.(*ListRefsResponse); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -4162,7 +4222,7 @@ func file_ref_proto_init() {
 			}
 		}
 		file_ref_proto_msgTypes[42].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*FindRefsByOIDResponse); i {
+			switch v := v.(*FindRefsByOIDRequest); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -4174,7 +4234,7 @@ func file_ref_proto_init() {
 			}
 		}
 		file_ref_proto_msgTypes[43].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*FindAllBranchesResponse_Branch); i {
+			switch v := v.(*FindRefsByOIDResponse); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -4186,7 +4246,7 @@ func file_ref_proto_init() {
 			}
 		}
 		file_ref_proto_msgTypes[44].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*FindAllTagsRequest_SortBy); i {
+			switch v := v.(*FindAllBranchesResponse_Branch); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -4198,7 +4258,7 @@ func file_ref_proto_init() {
 			}
 		}
 		file_ref_proto_msgTypes[45].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*GetTagSignaturesResponse_TagSignature); i {
+			switch v := v.(*FindAllTagsRequest_SortBy); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -4210,7 +4270,7 @@ func file_ref_proto_init() {
 			}
 		}
 		file_ref_proto_msgTypes[46].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*ListRefsRequest_SortBy); i {
+			switch v := v.(*GetTagSignaturesResponse_TagSignature); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -4222,6 +4282,18 @@ func file_ref_proto_init() {
 			}
 		}
 		file_ref_proto_msgTypes[47].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*ListRefsRequest_SortBy); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_ref_proto_msgTypes[48].Exporter = func(v interface{}, i int) interface{} {
 			switch v := v.(*ListRefsResponse_Reference); i {
 			case 0:
 				return &v.state
@@ -4234,7 +4306,7 @@ func file_ref_proto_init() {
 			}
 		}
 	}
-	file_ref_proto_msgTypes[26].OneofWrappers = []interface{}{
+	file_ref_proto_msgTypes[27].OneofWrappers = []interface{}{
 		(*DeleteRefsError_InvalidFormat)(nil),
 		(*DeleteRefsError_ReferencesLocked)(nil),
 	}
@@ -4244,7 +4316,7 @@ func file_ref_proto_init() {
 			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
 			RawDescriptor: file_ref_proto_rawDesc,
 			NumEnums:      4,
-			NumMessages:   48,
+			NumMessages:   49,
 			NumExtensions: 0,
 			NumServices:   1,
 		},
diff --git a/proto/go/gitalypb/ref_grpc.pb.go b/proto/go/gitalypb/ref_grpc.pb.go
index 0f0884a1c..d84760be1 100644
--- a/proto/go/gitalypb/ref_grpc.pb.go
+++ b/proto/go/gitalypb/ref_grpc.pb.go
@@ -34,7 +34,9 @@ type RefServiceClient interface {
 	FindAllBranches(ctx context.Context, in *FindAllBranchesRequest, opts ...grpc.CallOption) (RefService_FindAllBranchesClient, error)
 	// Returns a stream of tags repository has.
 	FindAllTags(ctx context.Context, in *FindAllTagsRequest, opts ...grpc.CallOption) (RefService_FindAllTagsClient, error)
-	// This comment is left unintentionally blank.
+	// FindTag looks up a tag by its name and returns it to the caller if it exists. This RPC supports
+	// both lightweight and annotated tags. Note: this RPC returns an `Internal` error if the tag was
+	// not found.
 	FindTag(ctx context.Context, in *FindTagRequest, opts ...grpc.CallOption) (*FindTagResponse, error)
 	// This comment is left unintentionally blank.
 	FindAllRemoteBranches(ctx context.Context, in *FindAllRemoteBranchesRequest, opts ...grpc.CallOption) (RefService_FindAllRemoteBranchesClient, error)
@@ -509,7 +511,9 @@ type RefServiceServer interface {
 	FindAllBranches(*FindAllBranchesRequest, RefService_FindAllBranchesServer) error
 	// Returns a stream of tags repository has.
 	FindAllTags(*FindAllTagsRequest, RefService_FindAllTagsServer) error
-	// This comment is left unintentionally blank.
+	// FindTag looks up a tag by its name and returns it to the caller if it exists. This RPC supports
+	// both lightweight and annotated tags. Note: this RPC returns an `Internal` error if the tag was
+	// not found.
 	FindTag(context.Context, *FindTagRequest) (*FindTagResponse, error)
 	// This comment is left unintentionally blank.
 	FindAllRemoteBranches(*FindAllRemoteBranchesRequest, RefService_FindAllRemoteBranchesServer) error
diff --git a/proto/ref.proto b/proto/ref.proto
index 42a0d9659..33729e036 100644
--- a/proto/ref.proto
+++ b/proto/ref.proto
@@ -55,7 +55,9 @@ service RefService {
     };
   }
 
-  // This comment is left unintentionally blank.
+  // FindTag looks up a tag by its name and returns it to the caller if it exists. This RPC supports
+  // both lightweight and annotated tags. Note: this RPC returns an `Internal` error if the tag was
+  // not found.
   rpc FindTag(FindTagRequest) returns (FindTagResponse) {
     option (op_type) = {
       op: ACCESSOR
@@ -268,20 +270,29 @@ message FindAllBranchesResponse {
   repeated Branch branches = 1;
 }
 
-// This comment is left unintentionally blank.
+// FindTagRequest is a request for the FindTag RPC.
 message FindTagRequest {
-  // This comment is left unintentionally blank.
+  // Repository is the repository to look up the tag in.
   Repository repository = 1 [(target_repository)=true];
-  // This comment is left unintentionally blank.
+  // TagName is the name of the tag that should be looked up. The caller is supposed to pass in the
+  // tag name only, so if e.g. a tag `refs/tags/v1.0.0` exists, then the caller should pass `v1.0.0`
+  // as argument.
   bytes tag_name = 2;
 }
 
-// This comment is left unintentionally blank.
+// FindTagResponse is a response for the FindTag RPC.
 message FindTagResponse {
-  // This comment is left unintentionally blank.
+  // Tag is the tag that was found.
   Tag tag = 1;
 }
 
+// FindTagError is an error that will be returned by the FindTag RPC under specific error
+// conditions.
+message FindTagError {
+  // TagNotFound indicates that the tag was not found.
+  ReferenceNotFoundError tag_not_found = 1;
+}
+
 // This comment is left unintentionally blank.
 message FindAllTagsRequest {
   // SortBy allows to specify desired order of the elements.
diff --git a/ruby/proto/gitaly/errors_pb.rb b/ruby/proto/gitaly/errors_pb.rb
index 620b645e5..f772b7291 100644
--- a/ruby/proto/gitaly/errors_pb.rb
+++ b/ruby/proto/gitaly/errors_pb.rb
@@ -31,6 +31,9 @@ Google::Protobuf::DescriptorPool.generated_pool.build do
       optional :reference_name, :bytes, 1
       optional :oid, :string, 2
     end
+    add_message "gitaly.ReferenceNotFoundError" do
+      optional :reference_name, :bytes, 1
+    end
     add_message "gitaly.ReferenceUpdateError" do
       optional :reference_name, :bytes, 1
       optional :old_oid, :string, 2
@@ -65,6 +68,7 @@ module Gitaly
   MergeConflictError = ::Google::Protobuf::DescriptorPool.generated_pool.lookup("gitaly.MergeConflictError").msgclass
   ReferencesLockedError = ::Google::Protobuf::DescriptorPool.generated_pool.lookup("gitaly.ReferencesLockedError").msgclass
   ReferenceExistsError = ::Google::Protobuf::DescriptorPool.generated_pool.lookup("gitaly.ReferenceExistsError").msgclass
+  ReferenceNotFoundError = ::Google::Protobuf::DescriptorPool.generated_pool.lookup("gitaly.ReferenceNotFoundError").msgclass
   ReferenceUpdateError = ::Google::Protobuf::DescriptorPool.generated_pool.lookup("gitaly.ReferenceUpdateError").msgclass
   ResolveRevisionError = ::Google::Protobuf::DescriptorPool.generated_pool.lookup("gitaly.ResolveRevisionError").msgclass
   LimitError = ::Google::Protobuf::DescriptorPool.generated_pool.lookup("gitaly.LimitError").msgclass
diff --git a/ruby/proto/gitaly/ref_pb.rb b/ruby/proto/gitaly/ref_pb.rb
index bfd341832..72aa78039 100644
--- a/ruby/proto/gitaly/ref_pb.rb
+++ b/ruby/proto/gitaly/ref_pb.rb
@@ -73,6 +73,9 @@ Google::Protobuf::DescriptorPool.generated_pool.build do
     add_message "gitaly.FindTagResponse" do
       optional :tag, :message, 1, "gitaly.Tag"
     end
+    add_message "gitaly.FindTagError" do
+      optional :tag_not_found, :message, 1, "gitaly.ReferenceNotFoundError"
+    end
     add_message "gitaly.FindAllTagsRequest" do
       optional :repository, :message, 1, "gitaly.Repository"
       optional :sort_by, :message, 2, "gitaly.FindAllTagsRequest.SortBy"
@@ -239,6 +242,7 @@ module Gitaly
   FindAllBranchesResponse::Branch = ::Google::Protobuf::DescriptorPool.generated_pool.lookup("gitaly.FindAllBranchesResponse.Branch").msgclass
   FindTagRequest = ::Google::Protobuf::DescriptorPool.generated_pool.lookup("gitaly.FindTagRequest").msgclass
   FindTagResponse = ::Google::Protobuf::DescriptorPool.generated_pool.lookup("gitaly.FindTagResponse").msgclass
+  FindTagError = ::Google::Protobuf::DescriptorPool.generated_pool.lookup("gitaly.FindTagError").msgclass
   FindAllTagsRequest = ::Google::Protobuf::DescriptorPool.generated_pool.lookup("gitaly.FindAllTagsRequest").msgclass
   FindAllTagsRequest::SortBy = ::Google::Protobuf::DescriptorPool.generated_pool.lookup("gitaly.FindAllTagsRequest.SortBy").msgclass
   FindAllTagsRequest::SortBy::Key = ::Google::Protobuf::DescriptorPool.generated_pool.lookup("gitaly.FindAllTagsRequest.SortBy.Key").enummodule
diff --git a/ruby/proto/gitaly/ref_services_pb.rb b/ruby/proto/gitaly/ref_services_pb.rb
index 67f5e76a1..ac905cd7b 100644
--- a/ruby/proto/gitaly/ref_services_pb.rb
+++ b/ruby/proto/gitaly/ref_services_pb.rb
@@ -27,7 +27,9 @@ module Gitaly
       rpc :FindAllBranches, ::Gitaly::FindAllBranchesRequest, stream(::Gitaly::FindAllBranchesResponse)
       # Returns a stream of tags repository has.
       rpc :FindAllTags, ::Gitaly::FindAllTagsRequest, stream(::Gitaly::FindAllTagsResponse)
-      # This comment is left unintentionally blank.
+      # FindTag looks up a tag by its name and returns it to the caller if it exists. This RPC supports
+      # both lightweight and annotated tags. Note: this RPC returns an `Internal` error if the tag was
+      # not found.
       rpc :FindTag, ::Gitaly::FindTagRequest, ::Gitaly::FindTagResponse
       # This comment is left unintentionally blank.
       rpc :FindAllRemoteBranches, ::Gitaly::FindAllRemoteBranchesRequest, stream(::Gitaly::FindAllRemoteBranchesResponse)