$ git clone -n https://gitee.com/fundawang/libcxx.git /var/lib/mock/dist-an23-build-293896-65200/root/chroot_tmpdir/scmroot/libcxx
Cloning into '/var/lib/mock/dist-an23-build-293896-65200/root/chroot_tmpdir/scmroot/libcxx'...
$ git reset --hard e0b1b421b3f42754748712d7268a708570a8af93
HEAD is now at e0b1b42 16.0.6
$ git lfs pull