Makefile: add back fetch target

Makefile

diff --git a/Makefile b/Makefile
index 2b8675c..1ccd574 100644
--- a/Makefile
+++ b/Makefile
@@ -318,3 +318,9 @@
 	@$(MAKE) -C $(TIMING_ROOT) -f $(TIMING_ROOT)/timing.mk caravel-timing-fast
 	@$(MAKE) -C $(TIMING_ROOT) -f $(TIMING_ROOT)/timing.mk caravel-timing-slow
 	@echo "You can find results for all corners in $(CUP_ROOT)/signoff/caravel/openlane-signoff/timing/"
+
+WOKWI_PROJECT_ID=334445762078310996
+
+.PHONY: fetch
+fetch:
+	curl https://wokwi.com/api/projects/$(WOKWI_PROJECT_ID)/verilog | sed -e "s/user_module_$(WOKWI_PROJECT_ID)/user_module/" > verilog/rtl/user_module.v