Bug 41284: Stop sync'ing changelogs between channels.

        changelogs = cb.create(**kwargs)

        path = f"projects/browser/Bundle-Data/Docs-{tag_prefix.upper()}/ChangeLog.txt"

        stable_tag = self.last_releases[(tag_prefix, "release")][0].tag

        alpha_tag = self.last_releases[(tag_prefix, "alpha")][0].tag

        if stable_tag.tagged_date > alpha_tag.tagged_date:

            last_tag = stable_tag

        else:

            last_tag = alpha_tag

        logger.debug("Using %s to add the new changelogs to.", last_tag.tag)

        last_changelogs = self.repo.git.show(f"{last_tag.tag}:{path}")

        # Take HEAD to reset any changes we might already have from a

        # previous run.

        last_changelogs = self.repo.git.show(f"HEAD:{path}")

        with (self.base_path / path).open("w") as f:

            f.write(changelogs + "\n" + last_changelogs + "\n")