$ git clone -n https://src.fedoraproject.org/flatpaks/fotocx /var/tmp/koji/tasks/347/132060347/fotocx
Cloning into '/var/tmp/koji/tasks/347/132060347/fotocx'...
$ git fetch origin ec6e01a4b0de2a5c4d9719b609e0eabd00e7a4cb:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/flatpaks/fotocx
 * [new ref]         ec6e01a4b0de2a5c4d9719b609e0eabd00e7a4cb -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ec6e01a F42