How to grep Git commit diffs or contents for a certain word?

Question

In a Git code repository I want to list all commits that contain a certain word. I tried this

git log -p | grep --context=4 "word"

but it does not necessarily give me back the filename (unless it's less that 5 lines away from the word I searched for. I also tried

git grep "word"

but it gives me only present files and not the history.

How do I search the entire history so I can follow changes on a particular word? I mean to search my codebase for occurrences of word to track down changes (search in files history).

Answer 1

git log's pickaxe will find commits with changes including "word" with git log -Sword