title: How to clone specific version of TensorFlow Models + Reasearch Models
body: <p>I am trying to use a specific version of <a href="https://github.com/tensorflow/models" rel="nofollow noreferrer">TensorFlow Models</a> (1.8.0) for object detection purpose. As mentioned in that page, Research Models are not officially supported or available in release branches. So, when I use the following command to clone the git repository:</p>
  
  <pre><code>git clone --branch r1.8.0 https://github.com/tensorflow/models.git
  </code></pre>
  
  <p>After downloading about 600MB, the <code>Research</code> directory doesn’t exist in <code>models</code> directory.</p>
  
  <p>How can I get <code>Research</code> directory which is compatible with r1.8.0</p>