diff --git a/Makefile b/Makefile
index 5d272cd..0039c5e 100644
--- a/Makefile
+++ b/Makefile
@@ -6,7 +6,7 @@ test:
 	tox
 
 tag:
-	git tag v$(TOR_VERSION)
+	git tag v$(TOR_VERSION) -f
 
 check:
 	pre-commit run --all-files
diff --git a/hooks/build b/hooks/build
new file mode 100644
index 0000000..2fa1f9c
--- /dev/null
+++ b/hooks/build
@@ -0,0 +1,3 @@
+#!/bin/bash
+
+docker build --build-arg tor_version=${SOURCE_BRANCH:1} -f $DOCKERFILE_PATH -t $IMAGE_NAME .