title: How can I view the output of `git show` in a diff viewer like meld, kdiff3, etc
body: <p>There are many SO questions that show how to view the output of a <code>git diff</code> command in a diff viewer like meld using <code>git difftool</code> or otherwise.  I am not asking about <code>git diff</code> though.</p>
  
  <p>I want to see the output of <code>git show &lt;previous commit sha1&gt;</code> in a diff viewer like meld. How can I do this?</p>