$ git clone -n https://src.fedoraproject.org/rpms/mrbs.git /var/lib/mock/f40-build-2012065-45766/root/chroot_tmpdir/scmroot/mrbs
Cloning into '/var/lib/mock/f40-build-2012065-45766/root/chroot_tmpdir/scmroot/mrbs'...
$ git fetch origin a5483bc424f9c5de989297de8e8d88b782066848:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/mrbs
 * [new ref]         a5483bc424f9c5de989297de8e8d88b782066848 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a5483bc Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild