Currently, the code for tagging historical builds in rpmautospec.tag_package operates on a local git repository. To be usable from Koji, it needs to optionally (alternatively or additionally) allow creating tags through the Pagure API for this (see koji_plugins/rpmautospec_hub.py).

Acceptance Criteria:

• The tag-package command as well as the rpmautospec.tag_package module let users choose to tag via the Pagure API, both as an alternative (i.e. only through Pagure) and in addition to tagging in the local repository.