$ git clone -n https://pagure.io/fedora-kiwi-descriptions.git /var/lib/mock/f40-kiwi-build-53886140-6478828/root/chroot_tmpdir/fedora-kiwi-descriptions
Cloning into '/var/lib/mock/f40-kiwi-build-53886140-6478828/root/chroot_tmpdir/fedora-kiwi-descriptions'...
$ git fetch origin 4d9f8d28eb1ac132f56baf60b7f6a6847d1bb85b:KOJI_FETCH_HEAD
From https://pagure.io/fedora-kiwi-descriptions
 * [new ref]         4d9f8d28eb1ac132f56baf60b7f6a6847d1bb85b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4d9f8d2 cloud: updates for s390x