1 files changed, 6 insertions, 1 deletions
diff --git a/app/models/protected_branch.rb b/app/models/protected_branch.rb
index b4e2d17c3e5..96002c8668a 100644
--- a/app/models/protected_branch.rb
+++ b/app/models/protected_branch.rb
@@ -27,12 +27,17 @@ class ProtectedBranch < ApplicationRecord
   # Check if branch name is marked as protected in the system
   def self.protected?(project, ref_name)
     return true if project.empty_repo? && project.default_branch_protected?
+    return false if ref_name.blank?
 
-    Rails.cache.fetch("protected_ref-#{ref_name}-#{project.cache_key}") do
+    Rails.cache.fetch(protected_ref_cache_key(project, ref_name)) do
       self.matching(ref_name, protected_refs: protected_refs(project)).present?
     end
   end
 
+  def self.protected_ref_cache_key(project, ref_name)
+    "protected_ref-#{project.cache_key}-#{Digest::SHA1.hexdigest(ref_name)}"
+  end
+
   def self.allow_force_push?(project, ref_name)
     project.protected_branches.allowing_force_push.matching(ref_name).any?
   end