title: git merge different repositories?
body: <p>I've been using SVN for all my projects.
  Sometimes project B is originating as a copy from project A.
  When project A has a generic change, I can use <code>svn merge A</code> within directory B and it will merge those changes.</p>
  
  <p>Now, if I wanted to use git. I don't like having all my projects in the same repository since I then have to clone <em>everything</em> and can't pick just one project like in SVN.
  But having one repository for each project, how do I go about doing the same like I did earlier with SVN?</p>
  
  <p><strong>The question is:</strong>
  What's the best way to structure it if I want several subprojects that really all relates to one original project and to keep them in sync? And that I also want to be able to check them out separately</p>