$ git clone -n https://gitee.com/fundawang/libcxx.git /var/lib/mock/dist-an23-build-294121-65215/root/chroot_tmpdir/scmroot/libcxx
Cloning into '/var/lib/mock/dist-an23-build-294121-65215/root/chroot_tmpdir/scmroot/libcxx'...
$ git reset --hard 3940195c1311758ebd1c3f412caae9622da979d5
HEAD is now at 3940195 use patch
$ git lfs pull