This is one thing I love about Magit for Emacs. The UI is really clever and slick—maybe the best Git frontend that I've ever used—but the way you interact with UI is by toggling flags and options that actually map to the underlying command line Git arguments. I can seamlessly hop into the command line and feel right at home using it directly.
On top of the UI having very tight and visible relationship to git CLI commands, there's also a log buffer showing you exact commands executed and their outputs, and it's only a single $ press away.
