 <p>No, because the only reference you can register in your GitHub repo would be a submodule one.<br> (as in "<a href="http://stackoverflow.com/q/5252450/6309">Using someone else's repo as a Git Submodule on GitHub</a>")</p> <p>And a submodule is all about referencing a <em>fixed</em> commit, not "the latest".</p> <p>You could work with <a href="https://help.github.com/articles/working-with-subtree-merge" rel="nofollow">subtree merging</a>, but:</p> <ul> <li>the update would be done locally</li> <li>that would duplicate the data (between Smarty initial repo and your own repo), pushed to GitHub.</li> </ul>