MacBook-Pro:webrat kamal$ git <tab><tab>
add                 cherry              diff                instaweb            rebase              show-ref 
am                  cherry-pick         fast-export         log                 relink              st 
annotate            ci                  fetch               lost-found          remote              stash 
apply               citool              filter-branch       ls-files            repack              status 
archive             clean               format-patch        ls-remote           request-pull        submodule 
bisect              clone               fsck                ls-tree             reset               svnimport 
blame               co                  gc                  merge               revert              tag 
br                  commit              get-tar-commit-id   mergetool           rm                  up 
branch              config              grep                mv                  send-email          var 
bundle              convert-objects     gui                 name-rev            shortlog            verify-pack 
checkout            count-objects       imap-send           pull                show                whatchanged 
checkout-index      describe            init                push                show-branch         
MacBook-Pro:webrat kamal$ git br<tab>
br       branch   
MacBook-Pro:webrat kamal$ git branch <tab><tab>
HEAD            master          onchange        origin/HEAD     origin/master