Merge branch 'jk/complete-checkout-sans-dwim-remote'

Completion for "git checkout <branch>" that auto-creates the branch out of a remote tracking branch can now be disabled, as this completion often gets in the way when completing to checkout an existing local branch that happens to share the same prefix with bunch of remote tracking branches. * jk/complete-checkout-sans-dwim-remote: completion: optionally disable checkout DWIM