$ git clone -n https://src.fedoraproject.org/flatpaks/olive /var/tmp/koji/tasks/1531/131821531/olive
Cloning into '/var/tmp/koji/tasks/1531/131821531/olive'...
$ git fetch origin 508f35b1116ecc2567c261b91ee82b3a57e864aa:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/flatpaks/olive
 * [new ref]         508f35b1116ecc2567c261b91ee82b3a57e864aa -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 508f35b F42