prow/pod-utils/downwardapi/jobspec.go
func getRevisionFromRef(refs *prowapi.Refs) string {
	if len(refs.Pulls) > 0 {
		return refs.Pulls[0].SHA
	}

	if refs.BaseSHA != "" {
		return refs.BaseSHA
	}

	return refs.BaseRef
}
func getRevisionFromRef(refs *prowapi.Refs) string {
	if len(refs.Pulls) > 0 {
		return refs.Pulls[0].SHA
	}

	if refs.BaseSHA != "" {
		return refs.BaseSHA
	}

	return refs.BaseRef
}
// getRevisionFromRef returns a ref or sha from a refs object