I'm not familiar with GitHub Desktop since (as far as I know) it's not available for Linux, but I did see this post that might point you in the right direction:
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I'm not familiar with GitHub Desktop since (as far as I know) it's not available for Linux, but I did see this post that might point you in the right direction:
The beginner's guide to contributing to projects with GitHub Desktop
Thea ・ Oct 13 '18 ・ 3 min read
It looks like a really good one. I hope it helps!