title: Jupyter notebook & 'git' is not recognized as an internal or external command, operable program or batch file
body: <p>I am trying the following code in a jupyter notebook</p>
  <pre><code>if not os.path.exists(os.path.join(paths['APIMODEL_PATH'], 'research', 'object_detection')):
      !git clone https://github.com/tensorflow/models {paths['APIMODEL_PATH']}
  </code></pre>
  <p>but I get the following error</p>
  <p>'git' is not recognized as an internal or external command,
  operable program or batch file.</p>
  <p>Git seems to work fine in cmd.</p>
  <p>I tried %%bash and %%cmd but that did not help.</p>
  <p>Any suggestions?</p>
  <p>many thanks!</p>