Re: [Q] `git fetch tag NAME' into mirror repo does not update HEAD, what to do?

From: Tomas Carnecky <tom@dbservice.com>
Date: Aug 12, 2010, 11:05 UTC
Message-ID: <4C63D579.507@dbservice.com>
In-Reply-To: <201008121238.51983.brian.foster@innova-card.com>

On 8/12/10 12:38 PM, Brian Foster wrote:

Show 5 quoted lines

> On Thursday 12 August 2010 10:33:13 Tomas Carnecky wrote:
> 
> Tom,
>  Thanks for the reply, but I suspect you didn't read
>  the problem correctly ....

I suspect I did but did not explain correctly (though I didn't realize mirror implies bare, my bad).

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> 
>> On 8/12/10 9:54 AM, Brian Foster wrote:
>>>  Bare repository ORIG's master looks like this:
>>> [ ... ] 
>>>  Repository SLAVE is a mirror clone of ORIG which
> NOTE.......................^^^^^^
>> [ ... ] 
>> Fetch only fetches commits. It doesn't update any local refs (other than
>> FETCH_HEAD). If you want to switch HEAD to that new tag, use checkout.

Oh boy, that explanation is really bad -.- What I meant is that if you don't supply the <dst> part of the refspec it will only update FETCH_HEAD. So 'git fetch origin master' will not update anything but FETCH_HEAD.

>  No, a fetch in a mirror, when fetching all the way
>  to the HEAD (e.g., a simple `git fetch origin'),
>  does update the branch.  (You can easily modify the
>  script I included to prove this.)

There are different ways to invoke git fetch. Either way, fetch will never modify HEAD. However, it can modify the branch that HEAD is pointing to (in case HEAD is a symref). But you are not fetching a branch, you are fetching a tag. So you need to use checkout after you fetch it. Either 'git checkout FETCH_HEAD' or 'git checkout v2'.

tom