$ git clone -n https://src.fedoraproject.org/rpms/python-PyLEMS.git /var/lib/mock/f40-build-2635968-66125/root/chroot_tmpdir/scmroot/python-PyLEMS
Cloning into '/var/lib/mock/f40-build-2635968-66125/root/chroot_tmpdir/scmroot/python-PyLEMS'...
$ git fetch origin c548ee15eec763db5d1649886b4d8b8b01bc6ffa:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-PyLEMS
 * [new ref]         c548ee15eec763db5d1649886b4d8b8b01bc6ffa -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c548ee1 Add Packit config