"git show HEAD" results in "fatal : ambiguous 'HEAD': unknown revision or path not in the working tree"
<p>I'm trying to fix a problem with <code>git</code>. </p>

<p>When I enter <code>git show HEAD</code>, I got the error <code>fatal : ambiguous 'HEAD': unknown revision or path not in the working tree</code>.</p>

<p>What could I do to fix this problem?</p>

<p>The display of <code>git status</code> is : </p>

<pre><code>git status
On branch master

Initial commit

Changes to be committed:
  (use "git rm --cached &lt;file&gt;..." to unstage)

    new file:   script.txt

Untracked files:
  (use "git add &lt;file&gt;..." to include in what will be committed)

    script.txt~
</code></pre>