[gnome-shell] ci: Fallback to HEAD when checking out branch

[Marge Bot <marge-bot src gnome org>]

commit 28f64072ba62be46703b3ef47a491855a00634e9
Author: Florian Müllner <fmuellner gnome org>
Date:   Wed Jul 14 20:10:44 2021 +0200

    ci: Fallback to HEAD when checking out branch
    
    ... instead of hardcoding origin/master as the default branch.
    
    Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1914>

 .gitlab-ci/checkout-mutter.sh | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/.gitlab-ci/checkout-mutter.sh b/.gitlab-ci/checkout-mutter.sh
index 82096af381..449a34e5d9 100755
--- a/.gitlab-ci/checkout-mutter.sh
+++ b/.gitlab-ci/checkout-mutter.sh
@@ -47,7 +47,7 @@ if [ -z "$mutter_target" ]; then
     mutter_target=FETCH_HEAD
   else
     echo \ not found
-    mutter_target=origin/master
+    mutter_target=HEAD
     echo Using $mutter_target instead
   fi
 fi