Git: Blame — Ignore Whitespace Changes
git.blame.ignoreWhitespace Make blame look through commits that only changed whitespace (git blame -w), in this window.
How to run it
Open the command palette (M-x in the Emacs keymap) and search for Git: Blame — Ignore Whitespace Changes, then press Enter. It has no default keybinding, but you can bind one in Settings → Keymaps.