$ git clone -n https://src.fedoraproject.org/rpms/python-jsonpickle.git /var/lib/mock/f40-build-2635060-66052/root/chroot_tmpdir/scmroot/python-jsonpickle
Cloning into '/var/lib/mock/f40-build-2635060-66052/root/chroot_tmpdir/scmroot/python-jsonpickle'...
$ git fetch origin 9d1e5e3e67824025f02a8f26a6bb1542750d23ea:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-jsonpickle
 * [new ref]         9d1e5e3e67824025f02a8f26a6bb1542750d23ea -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9d1e5e3 3.0.3