$ git clone -n https://src.fedoraproject.org/flatpaks/kiriki /var/tmp/koji/tasks/7695/131827695/kiriki
Cloning into '/var/tmp/koji/tasks/7695/131827695/kiriki'...
$ git fetch origin 83635fff0ce5aa3c37146318a18a1874a523909d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/flatpaks/kiriki
 * [new ref]         83635fff0ce5aa3c37146318a18a1874a523909d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 83635ff F42