"merge" branch reset in powerpc.git tree

[Dave C Boutcher]

On Fri, 23 Jun 2006 21:44:58 +1000, Paul Mackerras <paulus at samba.org> said:
> 
> If you are following the powerpc.git tree, and you pull the "merge"
> branch, you will need to reset it to have commit ID
> 5fa21d821f6972e70942f2c555ec29dde962bdb2 as its head.  That's also the
> head of the "master" branch and of Linus' linux-2.6 tree at the
> moment.

At risk of appearing like a git ignoramous...could you post the
command to perform such a reset?

Thanks

Dave B