title: cloning submodule fails
body: <p>I am trying to clone a submodule for my drupal installation. I run the following command:</p>
  
  <pre><code>git submodule add http://git.drupal.org/project/token.git /sites/all/modules/token
  </code></pre>
  
  <p>This throws this error:</p>
  
  <pre><code>The following path is ignored by one of your .gitignore files:
  /sites/all/modules/token
  Use -f if you really want to add it.
  </code></pre>
  
  <p>But my .gitignore file is empty.</p>
  
  <p>So I tried to run it as suggested:</p>
  
  <pre><code>submodule add -f http://git.drupal.org/project/token.git /sites/all/modules/token
  </code></pre>
  
  <p>But this throws this error:</p>
  
  <pre><code>fatal: could not create leading directories of '/sites/all/modules/token': Permission denied
  Clone of 'http://git.drupal.org/project/token.git' into submodule path '/sites/all/modules/token' failed
  </code></pre>
  
  <p>Permissions are 777.</p>
  
  <p>Ideas?</p>
  
  <p>Regards
  Lukas</p>