The warning: remote HEAD refers to nonexistent ref, unable to checkout.
means that the remote (bare) repository contains *branch reference* in the
file called HEAD with a value that does not match any published branch in
the same repository. In practice, that file defines *which branch* should
be checked out by default after cloning the repository.

https://stackoverflow.com/questions/11893678/warning-remote-head-refers-to-nonexistent-ref-unable-to-checkout

On Thu, Mar 9, 2023 at 2:51 PM Gary D. Gregory <ggreg...@apache.org> wrote:

> Hi All:
>
> My expectation is that:
>
> C:\Users\ggregory\git\a>git clone
> https://gitbox.apache.org/repos/asf/logging-log4j2.git logging-log4j3
>
> Would clone and checkout master (or main or whatever the default branch is
> called now) but instead, I get an empty folder and this output:
>
> Cloning into 'logging-log4j3'...
> remote: Enumerating objects: 262413, done.
> remote: Counting objects: 100% (262413/262413), done.
> remote: Compressing objects: 100% (68647/68647), done.
> remote: Total 262413 (delta 127358), reused 256238 (delta 122788)
> Receiving objects: 100% (262413/262413), 38.27 MiB | 11.31 MiB/s, done.
> Resolving deltas: 100% (127358/127358), done.
> warning: remote HEAD refers to nonexistent ref, unable to checkout
>
> This says nothing to help:
> https://github.com/apache/logging-log4j2/blob/2.x/BUILDING.md
> and nothing jumps out at me on the main page
> https://logging.apache.org/log4j/2.x/index.html
>
> So... what's the magic missing?
>
> TY!
> Gary
>
>

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