It is possible to use GIT_SSH wrapper within Phar-archive.

Bug described here: https://github.com/EuKov/panza/issues/1
Fixed.

Please merge.
Thank you.

We should tackle this in a separate pull request, see #2 for the open issue. I think I see where you are going, but I want to better understand the use cases. In order to avoid that conversation blocking resolution of this issue we should discuss and change in another pull request.