You can find on Stackoverflow several pertinent questions (like: "how to move a change from the main branch to another?") with lot of upvotes (showing that lot of people wondered about the same thing) and good answers.
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Pros
Pro Real-life examples
Pro Learning on Git can build industry reputation
Many employers consider Stack Overflow reputation to be an authoritative or semi-authoritative source about the quality of a person's coding. Learning Git with Stack Overflow can help with learning Stack Overflow processes and best practices which could help land a programming job once you're ready to start answering question and really begin racking up enough points to get the prizes...
Cons
Con Not always beginner friendly
As a resource for learning Git, Stack Overflow can sometimes have a habit of presenting complex answers to simple questions and vice verse, and is no substitute for properly curated and differentiated tutorial content.