$ git clone -n https://src.fedoraproject.org/rpms/gstreamer1-rtsp-server.git /var/lib/mock/f40-build-787954-134971/root/chroot_tmpdir/scmroot/gstreamer1-rtsp-server
Cloning into '/var/lib/mock/f40-build-787954-134971/root/chroot_tmpdir/scmroot/gstreamer1-rtsp-server'...
$ git fetch origin 016f6ceedcad05effe1fd37913ba0e1fe9f2eabc:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gstreamer1-rtsp-server
 * [new ref]         016f6ceedcad05effe1fd37913ba0e1fe9f2eabc -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 016f6ce 1.22.9