The amazing Chunzi, in addition to translating and helping to coordinate the translation of the Chinese version of Pro Git, has just sent me a draft epub of the book in Chinese.
As he says:
此书基本完成翻译，但仍有大半尚未审阅。今心血来潮，做了 epub 版本，可在 iPad 上阅读。生成代码在 http://github.com/chunzi/progit/tree/master/epub-zh。
I have also uploaded the file to S3 in addition to his cl.ly link. If you want Pro Git in Chinese on your iPad, you can download it here.