Re: odd behavior with concurrent fetch/checkout

> Just now I checked out a topic branch in my working repo:
> 
> 	git checkout server-xprt-switch
> 
> and while waiting for it to complete (I just started work and caches
> were all cold), I ran a
> 
> 	git fetch origin
> 
> in another window to update from Linus.  The git fetch gave a warning:
> 
> 	remote: Generating pack...
> 	remote: Counting objects: 7550
> 	remote: Done counting 12885 objects.
> 	remote: Result has 8400 objects.
> 	remote: Deltifying 8400 objects...
> 	remote:  100% (8400/8400) done
> 	Indexing 8400 objects...
> 	remote: Total 8400 (delta 7257), reused 5696 (delta 4586)
> 	 100% (8400/8400) done
> 	Resolving 7257 deltas...
> 	 100% (7257/7257) done
> 	* refs/remotes/origin/master: fast forward to branch 'master' of
> 	* git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6
> 	  old..new: d85714d..55b70a0
> 	Cannot fetch into the current branch.

> 
> Why the warning?  Also, afterwards I was left with server-xprt-switch
> pointing to the tip of the branch I'd just switched from (another
> miscellaneous topic branch).  The working directory was in some
> completely different state--thanks to a quick reset --hard I don't know
> what it was.  Also, in the reflog for the checked-out branch:
> 
> 	commit bac1e7977eb4781e62cee7f1c7c3d13a9e5d8d74
> 	Reflog: server-xprt-switch@{0} (J. Bruce Fields <bfields@citi.umich.edu>)
> 	Reflog message: fetch origin: Undoing incorrectly fetched HEAD.
> 	Author: J. Bruce Fields <bfields@citi.umich.edu>
> 	Date:   Mon Oct 22 12:32:37 2007 -0400
> 	...
> 
> Why was a fetch into the remote fooling with HEAD or anything under
> refs/heads/?
> 
> --b.
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