title: When do bundler update the gem incase of gems pointed to git repo?
body: <p>I am trying to move the common functionality of 3 Rails application into a gem. I have created the gem, tested it locally and is going to move to a private repository.</p>
  
  <p>So, now I am concerned about how to deal with case if I have change in the code inside the gem. Do I need to change the version of the gem, if I want to update the gem while <code>bundle update mygem</code>, or will Bundler detect the change from the commit hash of the git repo while doing <code>bundle update mygem</code>?</p>