Reverting to a previous git version

[Fabrice DELENTE <fdelente@xxxxxxxxxxxx>]

Hello.  
  
My question may be more git-related that wine-related, sorry for that but I 
have much trouble finding an answer. 
 
I have retrieved yesterday's git, but it introduced a bug that stops wine 
from starting.  
  
I want to revert to 0.9.56 using this same tree, how can I do that? I tried 
'git branch wine-0.9.56;git rebase origin' but it didn't work. 
 
Thanks.  

-- 
Fabrice DELENTE