One way is to read this: How to become a Git expert – freeCodeCamp.org. There’s a lot of good pages on how to get started on git, but if you are joining a software project, you may be expected to know more than the basics. You may be required to know the kind of things that piece talks about. Of course you can ask people on your team for help, but why not get as much skill as you can first and then ask better questions? There’s always something new to learn when it comes to git and software management: learn as much as you can by yourself and increase your skill set and your value to the team.