$ git clone -n https://src.fedoraproject.org/rpms/libcxx.git /var/lib/mock/f38-build-708967-92630/root/chroot_tmpdir/scmroot/libcxx
Cloning into '/var/lib/mock/f38-build-708967-92630/root/chroot_tmpdir/scmroot/libcxx'...
$ git reset --hard 81904bac6038ed7a368d03724a4d35ae27d50242
HEAD is now at 81904ba Update to LLVM 16.0.1