$ git clone -n https://src.fedoraproject.org/rpms/arptables.git /var/lib/mock/f41-build-side-1-2631872-25748/root/chroot_tmpdir/scmroot/arptables
Cloning into '/var/lib/mock/f41-build-side-1-2631872-25748/root/chroot_tmpdir/scmroot/arptables'...
$ git fetch origin 9f65cfb802e025c788fdf3218b7e1dab81d86453:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/arptables
 * [new ref]         9f65cfb802e025c788fdf3218b7e1dab81d86453 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9f65cfb convert GPLv2+ license to SPDX