Yes, github offers zip per release tag:
On Mon, May 8, 2017 at 2:02 PM Joseph Reagle <joseph.2...@reagle.org> wrote:
> Is this source downloadable as a zip?
> On 5/8/17 2:38 AM, Jaap Karssenberg wrote:
> > Just updated the PPA with a version "0.67~rc1", so release candidate for
> the next version. This release candidate should fix two critical issues and
> a set of smaller issues, more patches are still in the queue.
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