$ git clone -n https://src.fedoraproject.org/rpms/python-msgpack.git /var/lib/mock/f39-build-1443328-32561/root/chroot_tmpdir/scmroot/python-msgpack
Cloning into '/var/lib/mock/f39-build-1443328-32561/root/chroot_tmpdir/scmroot/python-msgpack'...
$ git fetch origin c7103fb6580af103593150b3eaa94c99eeb9650e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-msgpack
 * [new ref]         c7103fb6580af103593150b3eaa94c99eeb9650e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c7103fb Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild