protected function exportGitBranches(Git_RemoteServer_GerritServer $gerrit_server, $gerrit_project, GitRepository $repository)
 {
     $gerrit_project_url = $gerrit_server->getCloneSSHUrl($gerrit_project);
     $executor = new Git_Exec($repository->getFullPath(), $repository->getFullPath());
     $executor->exportBranchesAndTags($gerrit_project_url);
 }