Another, more modern way to do this is with git-multimail, as suggested by Chords below.
This is how you did it in 2009.
You could add something like this to your post-receive hook in $GITDIR/hooks, or use the script in the contrib directory of the source (Available here)
Flisks is a developer, digital marketing, SEO, and blogging enthusiast. Apart from copywriting, he loves travel, music, and adventures. He is a passionate learner and a dreamer.