$ git clone -n https://src.fedoraproject.org/rpms/maim.git /var/lib/mock/f45-build-17961-506/root/chroot_tmpdir/scmroot/maim
Cloning into '/var/lib/mock/f45-build-17961-506/root/chroot_tmpdir/scmroot/maim'...
$ git fetch origin a80a05081277b40275d3ca43fc6023eddc886cf5:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/maim
 * [new ref]         a80a05081277b40275d3ca43fc6023eddc886cf5 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a80a050 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild