$ git clone -n https://src.fedoraproject.org/forks/packit/rpms/image-builder.git /var/lib/mock/f43-build-61043934-6588094/root/chroot_tmpdir/scmroot/image-builder
Cloning into '/var/lib/mock/f43-build-61043934-6588094/root/chroot_tmpdir/scmroot/image-builder'...
$ git fetch origin ef7461d39727330ea326e3e6ef75e944b565885c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/forks/packit/rpms/image-builder
 * [new ref]         ef7461d39727330ea326e3e6ef75e944b565885c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ef7461d Update to 24 upstream release