Track file on Github under a different name, possible?

Is there any possibility to tell github to track the file under a different name? Example: Locally, I have a file passwords.config with real passwords, and sample-passwords.config with stubs. However, in public repo, I'd like to have only passwords.config with content from sample-passwords.config and real passwords.config ignored. I know .gitignore, which can hide my passwords.config, but I don't know is there any solution to rename sample-passwords.config while commiting to remote public repo. Of course, I'd like to avoid situation, when my local repo tracks renamed file as if something changed in git status.