homebrew cask 国内镜像用哪个好？

[meteor]

用中国科技大学的那个 http://mirrors.ustc.edu.cn/help/homebrew-cask.git.html 好像报错

error: Unable to get pack file https://mirrors.ustc.edu.cn/homebrew-cask.git/objects/pack/pack-a72bff65450e38127e39b16ce1007fb517ee5cd8.pack
The requested URL returned error: 416 Requested Range Not Satisfiable
error: Unable to find 2a663d87ec798e2de66f7c79f3ada6f9a1c22f1b under https://mirrors.ustc.edu.cn/homebrew-cask.git
Cannot obtain needed object 2a663d87ec798e2de66f7c79f3ada6f9a1c22f1b
error: fetch failed.

请问 homebrew cask 国内镜像用哪个更好呢？