git-1.5.0.rc2: "git pull -t" complains

I've got a repo here which is missing oldish tags, so I:

   $ git pull -t
   Warning: No merge candidate found because value of config option
	    "branch.master.merge" does not match any remote branch fetched.
   No changes.

Both "git pull --help" and git-pull(1) say this should work.
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Dr. Horst H. von Brand                   User #22616 counter.li.org
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