update git download instruction

README.md

@@ -46,6 +46,7 @@ We use `data.tar.zst` as an example here.
 
 #### by directly download
 
+You can selectively download certain variation of your choice.
 ![](direct_download_data.png)
 
 #### by git
@@ -60,6 +61,15 @@ git clone https://huggingface.co/datasets/mango-ttic/data
 # git clone https://hf-mirror.com/datasets/mango-ttic/data
 ```
 
+If you want to clone without large files - just their pointers
+
+```bash
+GIT_LFS_SKIP_SMUDGE=1 git clone https://huggingface.co/datasets/mango-ttic/data
+
+# or, use hf-mirror if your connection to huggingface.co is slow
+# GIT_LFS_SKIP_SMUDGE=1 git clone https://hf-mirror.com/datasets/mango-ttic/data
+```
+
 ### 2. decompress
 
 Because some json files are huge, we use tar.zst to package the data efficiently.