title: Why does Go-get ask me to pick a branch?
body: <p>I want to install mongoDB-driver. When I type this command</p>
  
  <pre><code>go get go.mongodb.org/mongo-driver/mongo
  </code></pre>
  
  <p>I got :</p>
  
  <pre><code>    #  cd /Users/jiangwei/go/src/go.mongodb.org/mongo-driver; git pull --ff-only
      There is no tracking information for the current branch.
      Please specify which branch you want to merge with.
      See git-pull(1) for details.
  
      git pull &lt;remote&gt; &lt;branch&gt;
  
      If you wish to set tracking information for this branch you can do so with:
  
      git branch --set-upstream-to=origin/&lt;branch&gt; master
  
      package go.mongodb.org/mongo-driver/mongo: exit status 1
  </code></pre>