Branch before first commit?
<p>In the following Atlassian SourceTree screenshot of my Git repository, there is a straight violet line without initial point. It suddenly appears at "Merge branch tom".</p>

<p><a href="https://i.stack.imgur.com/9mj0q.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/9mj0q.png" alt="Current git graph"></a></p>

<p>Ideally, I want the graph to look like the following instead:</p>

<p><a href="https://i.stack.imgur.com/nACgY.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/nACgY.png" alt="Desired graph"></a></p>

<p>The Git repository is available at <a href="https://github.com/coditers/WEB" rel="nofollow noreferrer">https://github.com/coditers/WEB</a>. My Github username is "student777" and I probably made a mistake. I did many operations, such as <code>git rebase</code>, <code>git merge</code>, <code>git checkout</code>... But I failed to fix it.</p>