Linus made git in his own resemblance

Git is a distributed version control system
There is no centralized repository
Each programmer gets hold of the whole history, locally
If everyone pulls from Torvalds, it's just because he has the best bits

Git manages the whole project as a unit
It doesn't keep separate history for each file
It supports renaming, copying, merging, splitting

Each version is blessed with its own SHA1 hash
There are no more sequential numbers that are hard to remember

Git has its own tools to share information over the network
It has its own client/server network protocol to exchange data
It can leverage on email as primary exchange channel