chore(make): correct version defaulting

Signed-off-by: Oliver Bähler <[email protected]>

Makefile

@@ -1,9 +1,6 @@
 # Version
 GIT_HEAD_COMMIT ?= $(shell git rev-parse --short HEAD)
-VERSION          ?= $(shell git describe --abbrev=0 --tags --match "v*")
-ifndef VERSION
-VERSION          = $(GIT_HEAD_COMMIT)
-endif
+VERSION         ?= $(or $(shell git describe --abbrev=0 --tags --match "v*" 2>/dev/null),$(GIT_HEAD_COMMIT))
 
 # Defaults
 REGISTRY        ?= ghcr.io
@@ -262,7 +259,7 @@ kustomize: ## Download kustomize locally if necessary.
 KO = $(shell pwd)/bin/ko
 KO_VERSION = v0.14.1
 ko:
-	$(call go-install-tool,$(KO),github.com/google/ko@v0.14.1)
+	$(call go-install-tool,$(KO),github.com/google/ko@$(KO_VERSION))
 
 ####################
 # -- Helpers