title: Forking github repo with submodules
body: <p>I'm trying to fork a github repo which uses several sub-modules. If I just fork the repo, the submodules are still referencing the original submodules (i.e., the submodules themselves arent forked). There are too many submodules for me manually fork them all! Is there a way to fork all the submodules too? </p>
  
  <p>Also, if possible I'd like to be able to update the submodules automatically if there are changes to them. Whats the best way to do this? Thank you! </p>