ci: add git ref

Makefile

@@ -1,7 +1,7 @@
 NAME = netoik-rp
 VERSION = $(shell git describe --always --tags --abbrev=0)
 RELEASE = $(shell git rev-parse --short HEAD)
-BRANCH = $(shell git branch --show-current)
+REFERENCE = $(if $(GIT_REFERENCE),$(GIT_REFERENCE),$(shell git branch --show-current))
 BUILD_ARCH = noarch
 
 RPM_RPMDIR = $(shell rpm --eval '%{_rpmdir}')
@@ -41,11 +41,11 @@ $(RPM_TARBALL_PATH): *
 	            --output="$@" \
 	            --prefix="$(NAME)-$(VERSION)/" \
 	            --verbose \
-	            "$(BRANCH)"
+	            "$(REFERENCE)"
 
 .PHONY: tarball
 tarball: $(RPM_TARBALL_PATH)
 
 .PHONY: upload
 upload:
-	curl --fail-with-body --upload-file "$(RPM_BUILD_PATH)" --user "$(PACKAGES_USERNAME):$(PACKAGES_TOKEN)" https://git.netoik.io/api/packages/samuel/rpm/upload
+	curl --fail-with-body --upload-file "$(RPM_BUILD_PATH)" --user "$(GIT_PACKAGES_USERNAME):$(GIT_PACKAGES_TOKEN)" https://git.netoik.io/api/packages/samuel/rpm/upload