$ git clone -n https://src.fedoraproject.org/rpms/crystal-stacker.git /var/lib/mock/f40-build-797406-141347/root/chroot_tmpdir/scmroot/crystal-stacker
Cloning into '/var/lib/mock/f40-build-797406-141347/root/chroot_tmpdir/scmroot/crystal-stacker'...
$ git fetch origin f5708c8970eaf4ef8feb733d1e45990a98429f9b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/crystal-stacker
 * [new ref]         f5708c8970eaf4ef8feb733d1e45990a98429f9b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f5708c8 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild