$ git clone -n https://src.fedoraproject.org/rpms/llvm16.git /var/lib/mock/f40-build-2525745-61811/root/chroot_tmpdir/scmroot/llvm16
Cloning into '/var/lib/mock/f40-build-2525745-61811/root/chroot_tmpdir/scmroot/llvm16'...
$ git fetch origin 78b7cdbc4c9ce5ad2a22d4309f0e8630e3661c53:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/llvm16
 * [new ref]         78b7cdbc4c9ce5ad2a22d4309f0e8630e3661c53 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 78b7cdb Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild