t4208: abstract away SHA-1-specific constants

diff --git a/t/t2027-worktree-list.sh b/t/t2027-worktree-list.sh
index 720063bf0d09bb8c577b78e099187abfc7da71b0..bb6fb9b12cb7f41cea671a7df830ccc97c592e4f 100755 (executable)
--- a/t/t2027-worktree-list.sh
+++ b/t/t2027-worktree-list.sh
@@ -116,7 +116,7 @@ test_expect_success 'broken main worktree still at the top' '
                git worktree add linked &&
                cat >expected <<-EOF &&
                worktree $(pwd)
-               HEAD $_z40
+               HEAD $ZERO_OID
 
                EOF
                cd linked &&