Search Git remote all branches for file contents

Question

Is it possible to search all of my Git remote branches for specific file contents (not just a file, but contents within them)?

My remotes are on GitHub, in case that

Answer 1

Assuming you are tracking all remote branches, this will search it in all commits:

git log --all -p | grep 'search-string'

To track all remote branches:

for remote in `git branch -r`; do git branch --track $remote; done