title: git fetch only for current branch
body: <p>I know that I can <a href="https://stackoverflow.com/questions/6368987/how-do-i-fetch-only-one-branch-of-a-remote-git-repository">fetch any remote branch to any local branch</a>, but is there also some kind of shortcut to fetch just from the tracked remote branch to the current tracking local branch (without the need to specify the local and remote branch names explicitly)?</p>
  
  <p>Motivation: I want to just fetch remote changes for the current branch to avoid getting (maybe large) changes from currently irrelevant branches. I will merge/rebase later in a separate step.</p>