$ git clone -n https://gitee.com/fundawang/libcxx.git /var/lib/mock/dist-an23-build-294227-65224/root/chroot_tmpdir/scmroot/libcxx
Cloning into '/var/lib/mock/dist-an23-build-294227-65224/root/chroot_tmpdir/scmroot/libcxx'...
$ git reset --hard 0c3e2f2a763ab948bcdac6648fbc68e39f426454
HEAD is now at 0c3e2f2 16.0.4
$ git lfs pull