title: VSCode "please clean your repository working tree before checkout"
body: <p>In Visual Studio Code I made some changes which I do not want to commit en sync yet. However, after my holiday, I want to sync the files from the server (changes from my colleagues). So In Visual Studio Code I want to do a sync.</p>
  
  <p>I get a message "Please clean your repository working tree before checkout" </p>
  
  <p>What do I need to do to get the files of my colleagues without losing my own uncommitted changes?</p>