$ git clone -n https://src.fedoraproject.org/rpms/gstreamer1-rtsp-server.git /var/lib/mock/f41-build-846995-163590/root/chroot_tmpdir/scmroot/gstreamer1-rtsp-server
Cloning into '/var/lib/mock/f41-build-846995-163590/root/chroot_tmpdir/scmroot/gstreamer1-rtsp-server'...
$ git fetch origin 57a17a193d428cf44b7684b2dfc221c22cde5da6:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gstreamer1-rtsp-server
 * [new ref]         57a17a193d428cf44b7684b2dfc221c22cde5da6 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 57a17a1 1.24.7