uncrustify_clean: avoid git abbreviation

utils/uncrustify_clean.sh

@@ -15,7 +15,7 @@ do
 	uncrustify -c $CFG --no-backup --replace "$fn"
 
 	cp "$fn" "$fn.NEW"
-	git co "$fn" 1> /dev/null
+	git checkout "$fn" 1> /dev/null
 
 	diff "$fn" "$fn.NEW" -u --ignore-trailing-space --ignore-blank-lines > "$fn.DIFF"
 
@@ -24,4 +24,3 @@ do
 	rm "$fn.NEW"
 	rm "$fn.DIFF"
 done
-