3 is not related to using git in any way. I'm not really sure what you mean in 4. I didn't mean making a lot of changes, I meant that you should not wait with committing until you have a finished feature / fix / whatever. Commit after each refactor, commit after adding a new testable unit. It's always better to have more checkpoints. If your team does code review, they will appreciate atomic commits too.

Our company "architects" decided we needed 80% coverage minimum. On a mostly .Net 4.8 codebase. Hundreds of programs used in prod, with barely any tests in sight.
It's a fucking nightmare.

Why would you care about code coverage requirements on a branch that is currently in development? My work in progress commits might not build because they don't even compile, let alone have passing tests. The only time I care about the build passing and meeting requirements is when I'm ready to create the pull request.

Also code coverage is a useless metric, but that's a different story.