- check if gitrevision is part of the packages_dir checkout, if not, and only then,
  do a git pull.
- consistency checks
  - check for more than one pkgname over multiple repos/archs, use vercmp
    to find the newer version
    - provide a report and a code snippet for arch32 builder to ignore all
      but the newest version
  - check for gitrevision from state to appear in packages for every package
  - check for all tags if they appear in the packages for every package
- integrate
  https://git.archlinux32.org/devops/tree/generate-bug-report