$ git clone -n https://src.fedoraproject.org/rpms/cantoolz.git /var/lib/mock/f40-build-2275090-55057/root/chroot_tmpdir/scmroot/cantoolz
Cloning into '/var/lib/mock/f40-build-2275090-55057/root/chroot_tmpdir/scmroot/cantoolz'...
$ git fetch origin ac7e7bbea062b38fd218db894efae51823d6585c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/cantoolz
 * [new ref]         ac7e7bbea062b38fd218db894efae51823d6585c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ac7e7bb Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild