$ git clone -n https://src.fedoraproject.org/rpms/python-xrst.git /var/lib/mock/f45-build-33789-674/root/chroot_tmpdir/scmroot/python-xrst
Cloning into '/var/lib/mock/f45-build-33789-674/root/chroot_tmpdir/scmroot/python-xrst'...
$ git fetch origin ff097c1a33b45adff200028b95b1aa4f45601ffe:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-xrst
 * [new ref]         ff097c1a33b45adff200028b95b1aa4f45601ffe -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ff097c1 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild