$ git clone -n https://src.fedoraproject.org/rpms/gstreamer1-rtsp-server.git /var/lib/mock/f40-build-2264043-54545/root/chroot_tmpdir/scmroot/gstreamer1-rtsp-server
Cloning into '/var/lib/mock/f40-build-2264043-54545/root/chroot_tmpdir/scmroot/gstreamer1-rtsp-server'...
$ git fetch origin 1fab50e0e1c2f93eee61d025fa811083f0c6a232:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gstreamer1-rtsp-server
 * [new ref]         1fab50e0e1c2f93eee61d025fa811083f0c6a232 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1fab50e SPDX Migration