Fix failing ./spec/lib/backup/repository_spec.rb by clearing the memoized value

app/models/repository.rb

@@ -331,6 +331,7 @@ class Repository
     return unless empty?
     expire_method_caches(%i(has_visible_content?))
+    raw_repository.expire_has_local_branches_cache
   end
   def lookup_cache

lib/gitlab/git/repository.rb

@@ -232,6 +232,10 @@ module Gitlab
         end
       end
+      def expire_has_local_branches_cache
+        clear_memoization(:has_local_branches)
+      end
+
       def has_local_branches?
         strong_memoize(:has_local_branches) do
           uncached_has_local_branches?

spec/lib/gitlab/git/repository_spec.rb

@@ -463,13 +463,14 @@ describe Gitlab::Git::Repository, seed_helper: true do
         it 'returns false when there are no branches' do
           # Sanity check
-          expect(repository.uncached_has_local_branches?).to eq(true)
+          expect(repository.has_local_branches?).to eq(true)
           FileUtils.rm_rf(File.join(repository.path, 'packed-refs'))
           heads_dir = File.join(repository.path, 'refs/heads')
           FileUtils.rm_rf(heads_dir)
           FileUtils.mkdir_p(heads_dir)
+          repository.expire_has_local_branches_cache
           expect(repository.has_local_branches?).to eq(false)
         end
       end

spec/models/repository_spec.rb

@@ -1437,6 +1437,12 @@ describe Repository do
       repository.expire_emptiness_caches
     end
+
+    it 'expires the memoized repository cache' do
+      allow(repository.raw_repository).to receive(:expire_has_local_branches_cache).and_call_original
+
+      repository.expire_emptiness_caches
+    end
   end
   describe 'skip_merges option' do