title: Add all files using git add except one directory
body: <p>I am trying to add all the files to my git index using </p>
  
  <pre><code>git add -A
  </code></pre>
  
  <p>However, there is one directory with very large files that is causing this error:</p>
  
  <pre><code>fatal: confused by unstable object source data for 9f8c02a8d2a04d7fffed08b299a0cb8996ab7ecb
  </code></pre>
  
  <p>Therefore, the adding process is broken! How can I tell git I want to exclude this directory while adding everything else? Available online solutions first add everything and then remove some files. Obviously, I cannot do this because git crashes while adding the files in that specific directory.</p>