Documentation Request: Synchronizing wikis

Assume I want to use Gitit as local install, but I want the same content to be available on multiple machines (say office PC, notebook, home PC).

Is there a built-in way to do this, maybe by using a central Git repository all installations can pull from and push to?

Can you just synchronize the installations using `unison` or similar? Does this work while Gitit is running, or do you have to restart?