$ git clone -n https://src.fedoraproject.org/rpms/python-jsonpickle.git /var/lib/mock/f41-build-1018612-17950/root/chroot_tmpdir/scmroot/python-jsonpickle
Cloning into '/var/lib/mock/f41-build-1018612-17950/root/chroot_tmpdir/scmroot/python-jsonpickle'...
$ git fetch origin 343e45cf3fe15b9624780cf305e1ff40ed96eab7:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-jsonpickle
 * [new ref]         343e45cf3fe15b9624780cf305e1ff40ed96eab7 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 343e45c 3.2.1