check git-annex message fix and updated spec

lib/gitlab/git_access.rb

@@ -213,7 +213,7 @@ module Gitlab
           end
 
         commits.each do |commit|
-          next if commit_from_annex_sync?(commit.id, ref)
+          next if commit_from_annex_sync?(commit.safe_message)
 
           if status_object = check_commit(commit, git_hook)
             return status_object
@@ -367,12 +367,11 @@ module Gitlab
       true
     end
 
-    def commit_from_annex_sync?(rev, ref)
+    def commit_from_annex_sync?(commit_message)
       return false unless Gitlab.config.gitlab_shell.git_annex_enabled
 
-      # Commit present in synced/current_branch, so avoid checking git hooks on this
-      branch_name = "synced/#{Gitlab::Git::Ref.extract_branch_name(ref)}"
-      project.repository.branch_names_contains(rev).include? branch_name
+      # Commit message starting with <git-annex in > so avoid git hooks on this
+      commit_message.start_with?('git-annex in')
     end
   end
 end

spec/lib/gitlab/git_access_spec.rb

@@ -327,8 +327,7 @@ describe Gitlab::GitAccess, lib: true do
           describe 'git annex enabled, push to master branch' do
             before do
               allow(Gitlab.config.gitlab_shell).to receive(:git_annex_enabled).and_return(true)
-              create(:ci_commit, project: project, sha: '570e7b2abdd848b95f2f578043fc23bd6f6fd24d', ref: 'refs/heads/master')
-              project.repository.add_branch(user, 'synced/master', '570e7b2abdd848b95f2f578043fc23bd6f6fd24d')
+              allow_any_instance_of(Commit).to receive(:safe_message) { 'git-annex in me@host:~/repo' }
             end
 
             it { expect(access.push_access_check(git_annex_master_changes)).to be_allowed }