mergetool feature request - select remote or local

sometimes when merge-ing fast forward doesn't work. but you know what the resolution you want is.

example (current behavior)
Normal merge conflict for 'css/main.css':
  {local}: modified
  {remote}: modified
Hit return to start merge resolution tool (vimdiff):

but I don't want to. I know the remote updates are right. I could do a git checkout remotebranch filename but when you have 20 files that need updating this is annoying

my suggestion is this
Normal merge conflict for 'css/main.css':
  {local}: modified
  {remote}: modified
Use (l)local or (r)remote or (m)anual? 

also in the event of having 20 files with this issue it would be nice to have an option after first starting mergetool for remote all or local all.

(note: I am not subscribed to the list)