Git Errors for local refs

I'm getting the error trying to do a pull from a repos I set up on  
GitHub yesterday.

error: some local refs could not be updated; try running
'git remote prune origin' to remove any old, conflicting branches

I've run the  'git remote prune origin' but still get the error doing  
the pull.

Any ideas how to resolve this?  Google seems to show me nothing on  
this and I have also looked at the manual.

I've run the git fsck and git gc but still seem to get these.

TIA

Brian Loomis