How to preserve user uploaded file in git?

I am having a application in openshift in which there is a option by which a user can upload an image. All the images uploaded by users is stored in location "/images/" All the thing is going well.

BUT when I modify/add file in my local Git Repository,

$ git commit -a -m "Modify local repo" $ git push

After pushing, all the file uploaded by user get deleted.

I though it was due to the file uploaded by user is not in the local repository when i commit and push git delete the files for the very same reason.

I tried $ git pull before commit and push but it say Already up-to-date.

How can i preserve the user uploaded files or how to syn it to local repository.