update_automation: allow to override repo and branch
update_automation: allow to override repo and branch

SUSE-Cloud/automation,gosipyan/automation,SUSE-Cloud/automation,gosipyan/automation,aspiers/automation,SUSE-Cloud/automation,aspiers/automation,vmoravec/automation,aspiers/automation,aspiers/automation,gosipyan/automation,vmoravec/automation,vmoravec/automation,gosipyan/automation,vmoravec/automation,SUSE-Cloud/automation