[recipes] Add --tags to git fetch command

This ensures that `git describe` will work.

Change-Id: Ie4baef261d0fba2913d08d2bd193f4a1f7e43985
Reviewed-on: https://gn-review.googlesource.com/2021
Reviewed-by: Scott Graham <scottmg@chromium.org>
Commit-Queue: Scott Graham <scottmg@chromium.org>
diff --git a/infra/recipes/gn.expected/ci.json b/infra/recipes/gn.expected/ci.json
index 8556002..e2e8933 100644
--- a/infra/recipes/gn.expected/ci.json
+++ b/infra/recipes/gn.expected/ci.json
@@ -19,6 +19,7 @@
     "cmd": [
       "git",
       "fetch",
+      "--tags",
       "https://gn.googlesource.com/gn",
       "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
     ],