I am attempting to use git to manage deployment to my live website. The problem that I\'m having is that I have a couple of settings files that I don\'t want to be updated w
ideally i want the contents in the repo to be changed before i run git checkout -f not changed in the live copy after
The closest is a filter content driver which will replace the value at the git checkout.

(from Scott Schacon's Pro Git book page on Git Attributes: section "Keyword Expansion")
So in your case: a smudge filter, declared in a .gitattributes file.
See "Can git automatically switch between spaces and tabs?", except you would use a sed to replace local to live (as in this example)