$ git clone -n https://src.fedoraproject.org/rpms/cdbs.git /var/lib/mock/f40-build-1992386-43594/root/chroot_tmpdir/scmroot/cdbs
Cloning into '/var/lib/mock/f40-build-1992386-43594/root/chroot_tmpdir/scmroot/cdbs'...
$ git fetch origin 5256368f7db7154340213ce5f1a353f746f75c05:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/cdbs
 * [new ref]         5256368f7db7154340213ce5f1a353f746f75c05 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5256368 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild