diff --git a/app/controllers/concerns/creates_commit.rb b/app/controllers/concerns/creates_commit.rb
index 643b61af1b2ff4876e356c54204de2ccf437c5f0..5d11f286e9acc7e267deb21e5664c72db69e85ea 100644
--- a/app/controllers/concerns/creates_commit.rb
+++ b/app/controllers/concerns/creates_commit.rb
@@ -4,7 +4,7 @@ module CreatesCommit
   def create_commit(service, success_path:, failure_path:, failure_view: nil, success_notice: nil)
     set_commit_variables
 
-    source_branch = @ref if @repository.find_branch(@ref)
+    source_branch = @ref if @ref && @repository.find_branch(@ref)
     commit_params = @commit_params.merge(
       source_project: @project,
       source_branch: source_branch,