git pull fails “unable to resolve reference” “unable to update local ref”

Using git 1.6.4.2, when I tried a git pull I get this error:

error: unable to resolve reference refs/remotes/origin/LT558-optimize-sql: No such file or directory
From git+ssh://remoteserver/~/misk5
 ! [new branch]      LT558-optimize-sql -> origin/LT558-optimize-sql  (unable to update local ref)
error: unable to resolve reference refs/remotes/origin/split-css: No such file or directory
 ! [new branch]      split-css  -> origin/split-css  (unable to update local ref)

I’ve tried git remote prune origin, but it didn’t help.