Hi Ondřej, On Fri, 17 Jan 2020, Ondrej Pohorelsky wrote: > We have encountered a bug where merge-base is missing in bash > completion. [1] The `merge-base` command is not considered a user-facing command: https://github.com/git/git/blob/v2.25.0/command-list.txt#L120 (the "plumbing" in "plumbinginterrogators" means that this is supposed to be a low-level command, to be used in scripts, but not so much interactively). Therefore I think that it is intentional that this command does not tab-complete: to declutter the list when typing git<TAB><TAB>. Ciao, Johannes