$ git clone -n https://src.fedoraproject.org/rpms/python-expandvars.git /var/lib/mock/f45-build-30575-646/root/chroot_tmpdir/scmroot/python-expandvars
Cloning into '/var/lib/mock/f45-build-30575-646/root/chroot_tmpdir/scmroot/python-expandvars'...
$ git fetch origin 4c1ebc5bb289936f500270c94033c289a81d4811:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-expandvars
 * [new ref]         4c1ebc5bb289936f500270c94033c289a81d4811 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4c1ebc5 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild