$ git clone -n https://src.fedoraproject.org/flatpaks/gst-debug-viewer /var/tmp/koji/tasks/978/132050978/gst-debug-viewer
Cloning into '/var/tmp/koji/tasks/978/132050978/gst-debug-viewer'...
$ git fetch origin 558749434fd7d324dead2651211725b3c6a322e3:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/flatpaks/gst-debug-viewer
 * [new ref]         558749434fd7d324dead2651211725b3c6a322e3 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5587494 F42