tools: move fetch before stash

tools/dep_updaters/update-zlib.sh

@@ -9,12 +9,12 @@ DEPS_DIR="$BASE_DIR/deps"
 
 echo "Comparing latest upstream with current revision"
 
+git fetch https://chromium.googlesource.com/chromium/src/third_party/zlib.git HEAD
+
 # Revert zconf.h changes before checking diff 
 perl -i -pe 's|^//#include "chromeconf.h"|#include "chromeconf.h"|' "$DEPS_DIR/zlib/zconf.h"
 git stash -- "$DEPS_DIR/zlib/zconf.h"
 
-git fetch https://chromium.googlesource.com/chromium/src/third_party/zlib.git HEAD
-
 DIFF_TREE=$(git diff --diff-filter=d 'stash@{0}:deps/zlib' FETCH_HEAD)
 
 git stash drop
@@ -27,11 +27,10 @@ fi
 # This is a rather arbitrary restriction. This script is assumed to run on
 # Sunday, shortly after midnight UTC. This check thus prevents pulling in the
 # most recent commits if any changes were made on Friday or Saturday (UTC).
-# Because of Google's own "Live at Head" philosophy, new bugs that are likely to
-# affect Node.js tend to be fixed quickly, so we don't want to pull in a commit
-# that was just pushed, and instead rather wait for the next week's update. If
-# no commits have been pushed in the last two days, we assume that the most
-# recent commit is stable enough to be pulled in.
+# We don't want to pull in a commit that was just pushed, and instead rather
+# wait for the next week's update. If no commits have been pushed in the last
+# two days, we assume that the most recent commit is stable enough to be
+# pulled in.
 LAST_CHANGE_DATE=$(git log -1 --format=%ct FETCH_HEAD)
 TWO_DAYS_AGO=$(date -d 'now - 2 days' '+%s')