title: Update to latest git version 2.2.x in CentOS
body: <p>The following is the current version.</p>
  
  <pre><code>git --version
  git version 2.1.0
  </code></pre>
  
  <p>How do I update to latest git version 2.2.x in CentOS.
  yum install git says its the latest version on the Linux AMI instance.</p>