$ git clone -n https://src.fedoraproject.org/rpms/python-cson.git /var/lib/mock/f45-build-30169-643/root/chroot_tmpdir/scmroot/python-cson
Cloning into '/var/lib/mock/f45-build-30169-643/root/chroot_tmpdir/scmroot/python-cson'...
$ git fetch origin 861d1e524405142e1caef9ef31eb96442ba88ce9:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-cson
 * [new ref]         861d1e524405142e1caef9ef31eb96442ba88ce9 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 861d1e5 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild