On Wed, Feb 18, 2015 at 4:25 PM, Junio C Hamano <gits...@pobox.com> wrote:
> Checking out a random branch is absolutely the worst thing you can
> do. Personally, I would think that the best thing you can do is to
> educate your users not to clone from a void. Create some history
> that is worth sharing, and then push into an empty repository.

Users are dumb.

Consider a website like GitHub where you create a repository on a a
remote server. It is initialized as an empty repo. They now want to
clone that empty repo to work with it:

  git clone https://example.com/foo
  cd foo
  .... hack hack
  git commit -a -m "Foo is awesome!"
  git push

This works from git-core servers because the ref advertisement tells
the client its an empty repo and its OK to checkout HEAD from nothing
and its all fine.

This fails from a JGit server because the ref advertisement for an
empty repository differs and disagrees with the format used by
git-core. The result is a confused client spewing an odd checkout
message.
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