$ git clone -n https://src.fedoraproject.org/rpms/python-et_xmlfile.git /var/lib/mock/f45-build-30558-646/root/chroot_tmpdir/scmroot/python-et_xmlfile
Cloning into '/var/lib/mock/f45-build-30558-646/root/chroot_tmpdir/scmroot/python-et_xmlfile'...
$ git fetch origin c47a1884342c76bf63ae8abab2fbdb3364013bde:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-et_xmlfile
 * [new ref]         c47a1884342c76bf63ae8abab2fbdb3364013bde -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c47a188 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild