[gnome-shell] ci: Improve script output

[Florian Müllner <fmuellner src gnome org>]

commit ab9710ee7ba43f50ac3a155c5c1b9be3ce3471a9
Author: Florian Müllner <fmuellner gnome org>
Date:   Fri Apr 26 20:34:45 2019 +0200

    ci: Improve script output
    
    git-fetch's -q flag doesn't suppress warnings, so it's not a full
    replacement of the redirection that was removed in commit 8cefd919.
    Shut up the cryptic warning and replace it with a clearer log message
    instead.
    
    https://gitlab.gnome.org/GNOME/gnome-shell/merge_requests/511

 .gitlab-ci/checkout-mutter.sh | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)
---
diff --git a/.gitlab-ci/checkout-mutter.sh b/.gitlab-ci/checkout-mutter.sh
index 9eb72ebfc..019346748 100755
--- a/.gitlab-ci/checkout-mutter.sh
+++ b/.gitlab-ci/checkout-mutter.sh
@@ -17,10 +17,11 @@ if [ "$CI_MERGE_REQUEST_TARGET_BRANCH_NAME" ]; then
   merge_request_branch=$CI_MERGE_REQUEST_SOURCE_BRANCH_NAME
 
   echo Looking for $merge_request_branch on remote ...
-  if git fetch -q $merge_request_remote $merge_request_branch; then
+  if git fetch -q $merge_request_remote $merge_request_branch 2>/dev/null; then
     mutter_target=FETCH_HEAD
   else
     mutter_target=origin/$CI_MERGE_REQUEST_TARGET_BRANCH_NAME
+    echo Using $mutter_target instead
   fi
 fi