velodrome/transform/fetcher.go
func (f *Fetcher) Fetch(db *gorm.DB) error {
	if err := f.fetchRecentIssues(db); err != nil {
		return err
	}
	if err := f.fetchRecentEventsAndComments(db); err != nil {
		return err
	}
	return nil
}
func (f *Fetcher) Fetch(db *gorm.DB) error {
	if err := f.fetchRecentIssues(db); err != nil {
		return err
	}
	if err := f.fetchRecentEventsAndComments(db); err != nil {
		return err
	}
	return nil
}
// Fetch retrieves all types of events, and push them to output channels