title: Git adding "unchanged" files to the stage
body: <p>For a project I'm working on, I want to use:</p>
  
  <pre><code>git add . -A
  </code></pre>
  
  <p>to add some files to the stage. The problem is that Git thinks these files are unchanged from the last commit, so they are ignored. However, I personally changed the file, but Git still sees the file as unchanged.</p>
  
  <p>How can I "forcefully" add that single file to my repository?</p>