Issue #3241318 by alexpott:...

Issue #3241318 by alexpott: core/tests/Drupal/Tests/Composer/Plugin/Scaffold/fixtures/scripts/disable-git-bin/git is an odd file and it has the file mode 755

core/tests/Drupal/Tests/Composer/Plugin/Scaffold/Functional/ManageGitIgnoreTest.php

@@ -202,7 +202,14 @@ public function testUnmanagedGitIgnoreWhenGitNotAvailable() {
     // executable script named 'git' that always exits with 127, as if git were
     // not found. Note that we run our tests using process isolation, so we do
     // not need to restore the PATH when we are done.
-    $unavailableGitPath = $this->fixtures->binFixtureDir('disable-git-bin');
+    $unavailableGitPath = $sut . '/bin';
+    mkdir($unavailableGitPath);
+    $bash = <<<SH
+#!/bin/bash
+exit 127
+
+SH;
+    file_put_contents($unavailableGitPath . '/git', $bash);
     chmod($unavailableGitPath . '/git', 0755);
     $oldPath = getenv('PATH');
     putenv('PATH=' . $unavailableGitPath . ':' . getenv('PATH'));

core/tests/Drupal/Tests/Composer/Plugin/Scaffold/fixtures/scripts/disable-git-bin/git

-#!/bin/bash
-exit 127