Commented out the sh-specific code, in cmd.exe

common.mk

@@ -737,7 +737,8 @@ clean-spec: PHONY
 
 check: main test test-tool test-all test-spec
 	$(ECHO) check succeeded
-	-$(Q) if [ x"$(GIT)" != x ] && $(CHDIR) "$(srcdir)" && \
+	-$(Q) : : "run only on sh"; \
+	if [ x"$(GIT)" != x ] && $(CHDIR) "$(srcdir)" && \
 	    b=`$(GIT) symbolic-ref --short HEAD 2>&1` && \
 	    u=`$(GIT) branch --list --format='%(upstream:short)' $$b`; then \
 	  set -x; $(GIT) --no-pager log --format=oneline -G "^ *# *include" $$u..HEAD --; \