$ git clone -n https://src.fedoraproject.org/rpms/extra-enforcer-rules.git /var/lib/mock/f41-build-1093686-19988/root/chroot_tmpdir/scmroot/extra-enforcer-rules
Cloning into '/var/lib/mock/f41-build-1093686-19988/root/chroot_tmpdir/scmroot/extra-enforcer-rules'...
$ git fetch origin e138a3e1e1c327f848dae19ce30c0d506ba17c6c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/extra-enforcer-rules
 * [new ref]         e138a3e1e1c327f848dae19ce30c0d506ba17c6c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e138a3e Update to upstream version 1.8.0