RFC: Adding an option to log-like commands to call an external command for each revision

I have this alias in my .gitconfig:

    review = "!f() { for rev in $(git rev-list --reverse \"$@\"); do
git show $rev; done; }; f"

I use it after I "git pull" to see what changed, e.g.:

    git review 49ea7b8..e1ef3c1

But sometimes I find that I want to do that for other things too, so I have these hacks:

    review-grep = "!f() { for rev in $(git log --reverse
--pretty=format:%H --grep=\"$@\"); do git show $rev; done; }; f"
    review-file = "!f() { for rev in $(git log --reverse
--pretty=format:%H \"$@\"); do git show $rev; done; }; f"

But just now I wanted to use -S instead of grep, but adding aliases like this is a bit silly.

Maybe we should have something like:

    git log --for-each=less a..b

To call "less" for each commit, what do you think?