我有一个远程裸存储库hub。我只在master分行工作。下面这条错误消息的最后一句话让我想知道：我如何找出哪个是 “当前分支的默认配置远程”
？我该如何设置？

[myserver]~/progs $ git remote -v
hub     ~/sitehub/progs.git/ (fetch)
hub     ~/sitehub/progs.git/ (push)

[myserver]~/progs $ git branch -r
  hub/master

[myserver]~/progs $ cat .git/HEAD
ref: refs/heads/master

[myserver]~/progs $ git pull hub
You asked to pull from the remote 'hub', but did not specify
a branch. Because this is not the default configured remote
for your current branch, you must specify a branch on the command line.