Broken tests due to gitlab-test update

% 	go test ./internal/... | grep FAIL
--- FAIL: TestCommitIsAncestorSuccess (0.08s)
FAIL
FAIL	gitlab.com/gitlab-org/gitaly/internal/service/commit	0.105s
--- FAIL: TestSuccessfulFindLocalBranches (0.01s)
FAIL
FAIL	gitlab.com/gitlab-org/gitaly/internal/service/ref	0.106s