public function fetchAllProjectRepositoriesForMirror(Git_Mirror_Mirror $mirror, array $project_ids)
 {
     $rows = $this->dao->fetchAllProjectRepositoriesForMirror($mirror->id, $project_ids);
     $repositories = array();
     foreach ($rows as $row) {
         $repositories[] = $this->repository_factory->instanciateFromRow($row);
     }
     return $repositories;
 }