Git can search diffs with the -S option (it’s called pickaxe in the docs)
git log -S password
This will find any commit that added or removed the string password. Here a few options:
-p: will show the diffs. If you provide a file (-p file), it will generate a patch for you.-G: looks for differences whose added or removed line matches the given regexp, as opposed to-S, which “looks for differences that introduce or remove an instance of string”.--all: searches over all branches and tags; alternatively, use--branches[=<pattern>]or--tags[=<pattern>]