ops: Tweak build script to support tags

Author: wiz

production/mempool-build-all

@@ -40,7 +40,7 @@ update_repo()
     git fetch origin || exit 1
     for remote in origin;do
         git remote add "${remote}" "https://github.com/${remote}/mempool" >/dev/null 2>&1
-        git fetch "${remote}" || exit 1
+        git fetch "${remote}" --tags || exit 1
     done
 
     if [ $(git tag -l "${REF}") ];then