$ git clone -n https://src.fedoraproject.org/rpms/python-gunicorn.git /var/lib/mock/f40-build-2106259-50593/root/chroot_tmpdir/scmroot/python-gunicorn
Cloning into '/var/lib/mock/f40-build-2106259-50593/root/chroot_tmpdir/scmroot/python-gunicorn'...
$ git fetch origin b0c2dfbea0a1d9846a535e9f2e6110c2fb28401b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-gunicorn
 * [new ref]         b0c2dfbea0a1d9846a535e9f2e6110c2fb28401b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b0c2dfb Add subpackages for gevent, eventlet, and setproctitle extras