title: Cloning Android's tegra kernel, it's empty?
body: <p>I followed the steps on 
  <a href="http://source.android.com/source/building-kernels.html" rel="nofollow">http://source.android.com/source/building-kernels.html</a>
   in order to look at the kernel sources.</p>
  
  <pre><code>$ git clone https://android.googlesource.com/kernel/tegra.git
  Cloning into 'tegra'...
  remote: Total 2219519 (delta 1857594), reused 2219519 (delta 1857594)
  Receiving objects: 100% (2219519/2219519), 436.09 MiB | 3.08 MiB/s, done.
  Resolving deltas: 100% (1857594/1857594), done.
  </code></pre>
  
  <p>Now, this is very strange... the project is <strong>empty</strong></p>
  
  <p><code>git log</code> shows the following:</p>
  
  <pre><code>$ git log
  commit a89a700fada233480530e4741cca876cfdd4eb9c
  Author: Jean-Baptiste Queru &lt;jbq@google.com&gt;
  Date:   Tue Nov 15 14:46:15 2011 -0800
  
      empty commit
  </code></pre>
  
  <p>what's going on, where are the sources ?</p>