git config --global alias.checkoutr checkout
nano /usr/local/share/zsh/site-functions/git-completion.bash...and then modify the file as follows...
-__gitcomp_nl "$(__git_refs '' $track)"
+if [ "$command" = "checkoutr" ]; then
+ __gitcomp_nl "$(__git_refs '' $track)"
+else
+ __gitcomp_nl "$(__git_heads '' $track)"
+fiUse git checkoutr for the default behavior and git checkout (or just gco) for browsing only local branches. Credits to http://cmetcalfe.ca/blog/git-checkout-autocomplete-local-branches-only.html.