$ git clone -n https://src.fedoraproject.org/rpms/conserver.git /var/lib/mock/f45-build-4436-332/root/chroot_tmpdir/scmroot/conserver
Cloning into '/var/lib/mock/f45-build-4436-332/root/chroot_tmpdir/scmroot/conserver'...
$ git fetch origin b815ce928b0ec89ead42222870321e79dbdcec11:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/conserver
 * [new ref]         b815ce928b0ec89ead42222870321e79dbdcec11 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b815ce9 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild