从git 1.6.4起，有了一个新的控制选项——remote.$name.pushurl，官方解释如下：

“git push $name” honors remote.$name.pushurl if present before using remote.$name.url. In other words, the URL used for fetching and pushing can be different.

也就是说，你可以有一个url用来取，一个url用来提交，下面是一个配置的例子

[remote "gitweb"]
        pushurl = ssh://me@example.com/gitrepo/mypj.git
        url = git://example.com/mypj.git
        fetch = +refs/heads/*:refs/remotes/gitweb/*