$ git clone -n https://src.fedoraproject.org/rpms/rust-zopfli.git /var/lib/mock/f40-build-1971995-25224/root/chroot_tmpdir/scmroot/rust-zopfli
Cloning into '/var/lib/mock/f40-build-1971995-25224/root/chroot_tmpdir/scmroot/rust-zopfli'...
$ git fetch origin d92820113e89bf25cedeaedc22e98b011bb354f2:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-zopfli
 * [new ref]         d92820113e89bf25cedeaedc22e98b011bb354f2 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d928201 Disable tests on s390x for now