$ git clone -n https://src.fedoraproject.org/rpms/icebreaker.git /var/lib/mock/f40-build-790610-136628/root/chroot_tmpdir/scmroot/icebreaker
Cloning into '/var/lib/mock/f40-build-790610-136628/root/chroot_tmpdir/scmroot/icebreaker'...
$ git fetch origin ea46f2a1c623ed3efd7b4da0b24b805f4dd8449b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/icebreaker
 * [new ref]         ea46f2a1c623ed3efd7b4da0b24b805f4dd8449b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ea46f2a Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild