Use testhelper.CreateTag to have a Git ident

Locally I can't run some tests as Git would like to know the identity of
the user creating new objects. In my case these object creations get the
following message:

```
testhelper.go:184:
        *** Please tell me who you are.

        Run

          git config --global user.email "you@example.com"
          git config --global user.name "Your Name"

        to set your account's default identity.
        Omit --global to set the identity only in this repository.

        fatal: empty ident name (for <zegerjan@callisto.localdomain>) not allowed
```

Now, this leverages system packages on the Git side to determine the
identname. In our case I think the best way to move forward is just to
use the `testhelper.CreateTag()`, which sets the ident for us.

2 files changed, 18 insertions, 7 deletions

diff --git a/internal/service/remote/update_remote_mirror_test.go b/internal/service/remote/update_remote_mirror_test.go
index de35d348c..b1a64389e 100644
--- a/internal/service/remote/update_remote_mirror_test.go
+++ b/internal/service/remote/update_remote_mirror_test.go
@@ -26,7 +26,10 @@ func TestSuccessfulUpdateRemoteMirrorRequest(t *testing.T) {
 
 	remoteName := "remote_mirror_1"
 
-	testhelper.MustRunCommand(t, nil, "git", "-C", mirrorPath, "tag", "v0.0.1", "master") // I needed another tag for the tests
+	testhelper.CreateTag(t, mirrorPath, "v0.0.1", "master", nil) // I needed another tag for the tests
+	testhelper.CreateTag(t, testRepoPath, "new-tag", "60ecb67744cb56576c30214ff52294f8ce2def98", nil)
+	testhelper.CreateTag(t, testRepoPath, "v1.0.0", "0b4bc9a49b562e85de7cc9e834518ea6828729b9", &testhelper.CreateTagOpts{
+		Message: "Overriding tag", Force: true})
 
 	setupCommands := [][]string{
 		// Preconditions
@@ -39,8 +42,6 @@ func TestSuccessfulUpdateRemoteMirrorRequest(t *testing.T) {
 		{"update-ref", "refs/heads/empty-branch", "0b4bc9a49b562e85de7cc9e834518ea6828729b9"}, // Update branch
 		{"branch", "-D", "not-merged-branch"},                                                 // Delete branch
 		// Scoped to the project, so will be removed after
-		{"tag", "new-tag", "60ecb67744cb56576c30214ff52294f8ce2def98"},                          // Add tag
-		{"tag", "-fam", "Overriding tag", "v1.0.0", "0b4bc9a49b562e85de7cc9e834518ea6828729b9"}, // Update tag
 		{"tag", "-d", "v0.0.1"}, // Delete tag
 	}
 
@@ -116,11 +117,13 @@ func TestSuccessfulUpdateRemoteMirrorRequestWithWildcards(t *testing.T) {
 		{"update-ref", "refs/heads/some-branch", "0b4bc9a49b562e85de7cc9e834518ea6828729b9"}, // Update branch
 		{"update-ref", "refs/heads/feature", "0b4bc9a49b562e85de7cc9e834518ea6828729b9"},     // Update branch
 		// Scoped to the project, so will be removed after
-		{"branch", "-D", "not-merged-branch"},                                                   // Delete branch
-		{"tag", "new-tag", "60ecb67744cb56576c30214ff52294f8ce2def98"},                          // Add tag
-		{"tag", "-fam", "Overriding tag", "v1.0.0", "0b4bc9a49b562e85de7cc9e834518ea6828729b9"}, // Update tag
+		{"branch", "-D", "not-merged-branch"}, // Delete branch
 	}
 
+	testhelper.CreateTag(t, testRepoPath, "new-tag", "60ecb67744cb56576c30214ff52294f8ce2def98", nil) // Add tag
+	testhelper.CreateTag(t, testRepoPath, "v1.0.0", "0b4bc9a49b562e85de7cc9e834518ea6828729b9",
+		&testhelper.CreateTagOpts{Message: "Overriding tag", Force: true}) // Update tag
+
 	for _, args := range setupCommands {
 		gitArgs := []string{"-C", testRepoPath}
 		gitArgs = append(gitArgs, args...)
@@ -129,7 +132,7 @@ func TestSuccessfulUpdateRemoteMirrorRequestWithWildcards(t *testing.T) {
 
 	// Workaround for https://gitlab.com/gitlab-org/gitaly/issues/1439
 	// Create a tag on the remote to ensure it gets deleted later
-	testhelper.MustRunCommand(t, nil, "git", "-C", mirrorPath, "tag", "v1.2.0", "master")
+	testhelper.CreateTag(t, mirrorPath, "v1.2.0", "master", nil)
 
 	newTagOid := string(testhelper.MustRunCommand(t, nil, "git", "-C", testRepoPath, "rev-parse", "v1.0.0"))
 	newTagOid = strings.TrimSpace(newTagOid)
diff --git a/internal/testhelper/tag.go b/internal/testhelper/tag.go
index 8ab0e64df..2abfd9dcf 100644
--- a/internal/testhelper/tag.go
+++ b/internal/testhelper/tag.go
@@ -11,16 +11,19 @@ import (
 // CreateTagOpts holds extra options for CreateTag.
 type CreateTagOpts struct {
 	Message string
+	Force   bool
 }
 
 // CreateTag creates a new tag.
 func CreateTag(t *testing.T, repoPath, tagName, targetID string, opts *CreateTagOpts) string {
 	var message string
+	force := false
 
 	if opts != nil {
 		if opts.Message != "" {
 			message = opts.Message
 		}
+		force = opts.Force
 	}
 
 	committerName := "Scrooge McDuck"
@@ -34,6 +37,11 @@ func CreateTag(t *testing.T, repoPath, tagName, targetID string, opts *CreateTag
 		"-c", fmt.Sprintf("user.email=%s", committerEmail),
 		"tag",
 	}
+
+	if force {
+		args = append(args, "-f")
+	}
+
 	if message != "" {
 		args = append(args, "-F", "-")
 	}