Exclude a file from a pull request‏

Hi all,
 
  I have a concern with r10k used by Puppet.
  r10k is a Puppet tool based on the git workflow.
 
  My concern is that one important file (Puppetfile) needs to be pushed to my remote repository so I can check the changes I commited.
  To do that, I need to commit changes (included to the Puppetfile) then I need to push it to the remote repository.
 
  Once I want to merge these changes from a specific branch to the master branch, I do NOT want to include this file. In other words, I want to merge all files except the Puppetfile file.
 
  What is the best way for you to do that?
 
Reminder: I can't ignore the file as I have to push it to the remote repository (origin) 

Regards,
Rudy YAYON