$ git clone -n https://src.fedoraproject.org/rpms/ck.git /var/lib/mock/f45-build-3885-329/root/chroot_tmpdir/scmroot/ck
Cloning into '/var/lib/mock/f45-build-3885-329/root/chroot_tmpdir/scmroot/ck'...
$ git fetch origin 7a32f4707b5687fdb62d15488059bc94ddfa462b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ck
 * [new ref]         7a32f4707b5687fdb62d15488059bc94ddfa462b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7a32f47 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild