How to invert `git log --grep=` or How to show git logs that don't match a pattern

Question

I want to use git log to show all commits that do not match a given pattern. I know I can use the following to show all commits that do match a pattern:

Answer 1

get a list of all commits containing your result, then filter out their hashes.

git log --format=oneline | grep -v `git log --grep="bumped to version" --format="%h"`