git config with multiple push urls to windows share

config.ini

[core]
        repositoryformatversion = 0
        filemode = false
        bare = false
        logallrefupdates = true
        symlinks = false
        ignorecase = true
[remote "origin"]
        url = //host/tmp/a
        fetch = +refs/heads/*:refs/remotes/origin/*
        pushurl = //host/tmp/a
        pushurl = //host/tmp/b
[branch "master"]
        remote = origin
        merge = refs/heads/master