$ git clone -n https://src.fedoraproject.org/rpms/kf6-prison.git /var/lib/mock/f40-build-742147-110606/root/chroot_tmpdir/scmroot/kf6-prison
Cloning into '/var/lib/mock/f40-build-742147-110606/root/chroot_tmpdir/scmroot/kf6-prison'...
$ git fetch origin 207f943d64d487e6c18da82cbf71388a5ac92091:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kf6-prison
 * [new ref]         207f943d64d487e6c18da82cbf71388a5ac92091 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 207f943 5.245.0