From mboxrd@z Thu Jan  1 00:00:00 1970
From: Jeff King <peff@peff.net>
Subject: Re: What is the default refspec for fetch?
Date: Sat, 8 Nov 2014 05:52:21 -0500
Message-ID: <20141108105221.GA20750@peff.net>
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To: Christian Halstrick <christian.halstrick@gmail.com>
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On Fri, Nov 07, 2014 at 04:31:08PM +0100, Christian Halstrick wrote:

> In a repo where no remote.<name>.fetch config parameter is set what
> should a "git fetch" do? My experiments let me think it's
> "HEAD:FETCH_HEAD". Right?

Basically, yes. We always write FETCH_HEAD, regardless of the refspec.
We choose "HEAD" if no other refspec was provided. So it is really more
like

  git fetch $remote HEAD

This is what makes one-off bare-url pulls work, like:

  git pull git://...

It runs fetch under the hood, which writes into FETCH_HEAD, and then we
merge that.

-Peff