Merge pull request #294 from stuggi/branch_var

Use conditional assignment for BRANCH

Author: openshift-merge-bot[bot]

Makefile

@@ -382,7 +382,7 @@ run-with-webhook: manifests generate fmt vet ## Run a controller from your host.
 CRD_SCHEMA_CHECKER_VERSION ?= release-4.16
 
 PHONY: crd-schema-check
-BRANCH=main
+BRANCH ?= main
 crd-schema-check: manifests
 	INSTALL_DIR=$(LOCALBIN) CRD_SCHEMA_CHECKER_VERSION=$(CRD_SCHEMA_CHECKER_VERSION) hack/build-crd-schema-checker.sh
 	INSTALL_DIR=$(LOCALBIN) BASE_REF="$${PULL_BASE_SHA:-$(BRANCH)}" hack/crd-schema-checker.sh