How to pull changes from Github to CodeSandbox

How to pull changes from Github to CodeSandbox
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#1

I was not seeing my changes from Github pulled into CodeSandBox. This link suggested that I needed to commit the changes which i don’t understand.

But anyway, I tried but nothing happened when I pressed the Commit button here:

I tried to read through the rest of the document but I don’t understand…can someone help!

Thank you.