I think what you want is this:
git pull --rebase -s recursive -X ours
But it doesn't work (I'm using 1.7.0.4), even though the manpage says it should. I'm guessing this is due to the issue mentioned here.
Instead, you could use:
git pull -s recursive -X theirs
It works as expected, but you'll get a merge instead of a rebase.
Also - note 'ours', rather than 'theirs' when using --rebase. From the git-rebase manpage:
[CLIP]... a rebase merge works by replaying each commit from the working branch on top of the upstream branch. Because of this, when a merge conflict happens, the side reported as ours is the so-far rebased series, starting with upstream, and theirs is the working branch. In other words, the sides are swapped. ...[CLIP]