Fun fact, when I worked at Red Hat for many years on the Opensource.com project, we created a collection of dozens of great articles on the ins and outs of git, written by open source community members. You can still find most of those articles here:

https://opensource.com/tags/git

Unfortunately, the team who ran site got caught up in Red Hat's layoffs earlier this year and the site has been sitting in limbo ever since, so I don't know what will happen to it long term.