$ git clone -n https://gitee.com/fundawang/libcxx.git /var/lib/mock/dist-an23-build-294100-65215/root/chroot_tmpdir/scmroot/libcxx
Cloning into '/var/lib/mock/dist-an23-build-294100-65215/root/chroot_tmpdir/scmroot/libcxx'...
$ git reset --hard 91e6a6b4046fb403a2ccb3711710c90f4aca44db
HEAD is now at 91e6a6b add
$ git lfs pull