$ git clone -n https://src.fedoraproject.org/rpms/iptables.git /var/lib/mock/f45-build-14203-457/root/chroot_tmpdir/scmroot/iptables
Cloning into '/var/lib/mock/f45-build-14203-457/root/chroot_tmpdir/scmroot/iptables'...
$ git fetch origin 268c3873ef3cf87017e7b0485f778ec948cf8da5:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/iptables
 * [new ref]         268c3873ef3cf87017e7b0485f778ec948cf8da5 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 268c387 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild