How do I add the branch creator to `git checkout` branch completion in zsh?

Question

When you want to check out a git branch you can type git checkoutTAB to list the available branches:

$ git checkout feature-
feature-1 feature-2

How can I add additional info such as branch creator and updated ago to the list of autocompleted branches?

$ git checkout <TAB>
develop by Full Name 2 hours ago
staging by Full Name 1 day ago

Answer 1

It is not possible to override the zsh completion commands provided by git.