$ git clone -n https://src.fedoraproject.org/rpms/python-u-msgpack-python.git /var/lib/mock/f39-build-1426258-31588/root/chroot_tmpdir/scmroot/python-u-msgpack-python
Cloning into '/var/lib/mock/f39-build-1426258-31588/root/chroot_tmpdir/scmroot/python-u-msgpack-python'...
$ git fetch origin 1db199fbbbcd0a7bce3f899c8755c07571e2f555:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-u-msgpack-python
 * [new ref]         1db199fbbbcd0a7bce3f899c8755c07571e2f555 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1db199f Rebuilt for https://fedoraproject.org/wiki/Fedora_38_Mass_Rebuild