[opensuse-buildservice] Setting up "branches" projects so they are not deleted after SRs are accepted

Hi guys, I remember someone describing how to do this on the list, but I cannot find it for the life of me. I think there was a way to keep "branches"-subprojects, that are automatically created by OBS when doing "osc branch foo/bar". But they are also deleted when the only package in there is being submitted and the SR is accepted. Am I remembering this right? Is there a way to achieve that? Or is my memory playing tricks on me? Kind Regards Johannes