Editora 0.11.0. Archived, so links from that release keep working. Read the 0.18.0 page →
Git Log: Copy Commit Hash
git.log.copyHash Copy the selected commit's hash to the clipboard.
How to run it
Open the command palette (M-x in the Emacs keymap) and search for Git Log: Copy Commit Hash, then press Enter. It has no default keybinding, but you can bind one in Settings → Keymaps.