$ git clone -n https://src.fedoraproject.org/rpms/python-serpent.git /var/lib/mock/f45-build-32932-665/root/chroot_tmpdir/scmroot/python-serpent
Cloning into '/var/lib/mock/f45-build-32932-665/root/chroot_tmpdir/scmroot/python-serpent'...
$ git fetch origin d2f0ae71499334bfc6923c7c596001d2b5d99cf5:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-serpent
 * [new ref]         d2f0ae71499334bfc6923c7c596001d2b5d99cf5 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d2f0ae7 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild