$ git clone -n https://src.fedoraproject.org/rpms/lowdown.git /var/lib/mock/f45-build-17541-501/root/chroot_tmpdir/scmroot/lowdown
Cloning into '/var/lib/mock/f45-build-17541-501/root/chroot_tmpdir/scmroot/lowdown'...
$ git fetch origin a13f2309989be07c68f9335f75a07282d0e84fa2:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/lowdown
 * [new ref]         a13f2309989be07c68f9335f75a07282d0e84fa2 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a13f230 Update to v3.1.1