$ git clone -n https://src.fedoraproject.org/rpms/python3.6.git /var/lib/mock/f45-build-43473-803/root/chroot_tmpdir/scmroot/python3.6
Cloning into '/var/lib/mock/f45-build-43473-803/root/chroot_tmpdir/scmroot/python3.6'...
$ git fetch origin 273c2748f01c5401680b916421630366a8b5dd85:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python3.6
 * [new ref]         273c2748f01c5401680b916421630366a8b5dd85 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 273c274 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild