$ git clone -n https://gitee.com/fundawang/libcxx.git /var/lib/mock/dist-an23-build-294165-65215/root/chroot_tmpdir/scmroot/libcxx
Cloning into '/var/lib/mock/dist-an23-build-294165-65215/root/chroot_tmpdir/scmroot/libcxx'...
$ git reset --hard a0faeb9291ceaa9e60c5a28d0e79d99ceab6b0da
HEAD is now at a0faeb9 16.0.6
$ git lfs pull