title: ignoring changes in committed files in git
body: <p>I got some files in my repo that can be changed during the development, but I don't want to commit the changes in those files. In another words, those files should be read-only files inside my git.
  The question is, how can I make <code>git status</code> ignoring them? AFAIU, .gitignore isn't fitted for this task.
  (There are many such files - they being changed automatically by a script)</p>