I use something similar:

    [alias]
        lt = log --graph --pretty=changes
    [pretty]
        changes = format:%Cred%h%Creset -%C(yellow)%d%Creset %s %Cgreen(%cr) %C(bold blue)<%an>%Creset

It's nice to be able to separate the format specifier from the alias itself. Makes the configuration a lot cleaner.

i like your config i'll borrow some of that, here's my current one

https://gist.github.com/fishman/091d32da731c8b841c94

EDIT: I either already did many many moons ago, or we would had the same master :p

What is that color scheme? It's pretty great.