$ git clone -n https://gitee.com/fundawang/libcxx.git /var/lib/mock/dist-an23-build-294016-65200/root/chroot_tmpdir/scmroot/libcxx
Cloning into '/var/lib/mock/dist-an23-build-294016-65200/root/chroot_tmpdir/scmroot/libcxx'...
$ git reset --hard 4db8951aa5e45ad9c7fd705dc610987f39924957
HEAD is now at 4db8951 add
$ git lfs pull