What tool is Mosh using in this video?

Mosh seems to be using a cmd window, however his window looks far different than what mine looks like. Which tool is it that he’s using in this video?

Video: Git Tutorial for Beginners: Learn Git in 1 Hour - YouTube

He mostly works from the command line. Or terminal window. He works on a Mac and has changed his command prompt a bit so that it is colorful and more informative for working with git. you can do the same with Windows but it is a bit tricky.