[mutter] ci: Fallback to HEAD when checking out branch

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

commit cc04f936838b2de827f723c72f241f8f9ad75787
Author: Florian Müllner <fmuellner gnome org>
Date:   Wed Jul 14 20:39:27 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/mutter/-/merge_requests/1930>

 .gitlab-ci/checkout-gnome-shell.sh | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/.gitlab-ci/checkout-gnome-shell.sh b/.gitlab-ci/checkout-gnome-shell.sh
index 49969cca33..e4bb9c45cd 100755
--- a/.gitlab-ci/checkout-gnome-shell.sh
+++ b/.gitlab-ci/checkout-gnome-shell.sh
@@ -47,7 +47,7 @@ if [ -z "$gnome_shell_target" ]; then
     gnome_shell_target=FETCH_HEAD
   else
     echo \ not found
-    gnome_shell_target=origin/master
+    gnome_shell_target=HEAD
     echo Using $gnome_shell_target instead
   fi
 fi