Simply cd into your Git repository and run git instaweb. You will be presented with a lightweight web GUI to browse commits and diffs.
You may need to install lighttpd if you're a Linux user or the Ruby gem webrick if you're a MacOS user.
original information - https://www.reddit.com/r/ProgrammerTIL/comments/95wo0a/git_til_that_git_has_a_web_gui_built_in/