Eclipse git pull 报Nothing to fetch 异常原因

eclipse git pull 报错

// 使用这个配置就可以正常pull了        
[core]
        symlinks = false 
        repositoryformatversion = 0
        filemode = false
        logallrefupdates = true
[branch "master"]
        remote = origin
        merge = refs/heads/master
[remote "origin"]
        url = https://code.jd.com/tree_new_bee/MySinaWeiboApp.git
        fetch = +refs/heads/*:refs/remotes/origin/*