Re: [PATCH 1/9] init: allow overriding the default branch name for new repositories

> From: Don Goodman-Wilson <don@goodman-wilson.com>
> 
> There is a growing number of projects trying to avoid the non-inclusive
> name `master` in their repositories. For existing repositories, this
> requires manual work. For new repositories, the only way to do that
> automatically is by copying all of Git's template directory, then
> hard-coding the desired default branch name into the `.git/HEAD` file,
> and then configuring `init.templateDir` to point to those copied
> template files.
> 
> To make this process much less cumbersome, let's introduce support for
> `core.defaultBranchName`. That way, users won't need to keep their
> copied template files up to date, and won't interfere with default hooks
> installed by their administrators.
> 
> While at it, also let users set the default branch name via the
> environment variable `GIT_TEST_DEFAULT_BRANCH_NAME`, in preparation for
> adjusting Git's test suite to a more inclusive default branch name. As
> is common in Git, the `GIT_TEST_*` variable takes precedence over the
> config setting.
>