Editora 0.20.0. Archived, so links from that release keep working. Read the 0.24.0 page →
Git: Show Commit for Line
git.blameShowCommit Open the diff for the commit that last changed the caret line.
How to run it
Open the command palette (M-x in the Emacs keymap) and search for Git: Show Commit for Line, then press Enter. It has no default keybinding, but you can bind one in Settings → Keymaps.