$ git clone -n https://src.fedoraproject.org/rpms/llvm16.git /var/lib/mock/f40-build-2278868-55291/root/chroot_tmpdir/scmroot/llvm16
Cloning into '/var/lib/mock/f40-build-2278868-55291/root/chroot_tmpdir/scmroot/llvm16'...
$ git fetch origin d6b0876ea0c76c0b127f4bb495b333d3f46c2b7d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/llvm16
 * [new ref]         d6b0876ea0c76c0b127f4bb495b333d3f46c2b7d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d6b0876 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild