$ git clone -n https://src.fedoraproject.org/forks/music/rpms/python-orjson.git /var/lib/mock/f43-build-61075590-6588621/root/chroot_tmpdir/scmroot/python-orjson
Cloning into '/var/lib/mock/f43-build-61075590-6588621/root/chroot_tmpdir/scmroot/python-orjson'...
$ git fetch origin 49bc586dcea13d170b474ed7ebcf378e098acbb5:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/forks/music/rpms/python-orjson
 * [new ref]         49bc586dcea13d170b474ed7ebcf378e098acbb5 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 49bc586 Update to 3.11.0 (close RHBZ#2380202)