$ git clone -n https://src.fedoraproject.org/rpms/python-paste.git /var/lib/mock/f40-build-2028137-47357/root/chroot_tmpdir/scmroot/python-paste
Cloning into '/var/lib/mock/f40-build-2028137-47357/root/chroot_tmpdir/scmroot/python-paste'...
$ git fetch origin f6a9f05d2ca73a654425159b6d4404b3f4498d58:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-paste
 * [new ref]         f6a9f05d2ca73a654425159b6d4404b3f4498d58 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f6a9f05 Update to upstream.