build(integration): clone properly from the local repo when in a detached HEAD state

src/cli/tests/cli.integration.spec.ts

@@ -40,7 +40,8 @@ const branch = execa.sync('git', [
   'HEAD'
 ]).stdout;
 const repoInfo = {
-  branch: branch === 'HEAD' ? 'master' : branch,
+  // if local repo is in a detached HEAD state, providing --branch to `git clone` will fail.
+  branch: branch === 'HEAD' ? '.' : branch,
   repo: process.cwd()
 };
 const buildDir = join(process.cwd(), 'build');

src/cli/tests/cli.unit.spec.ts

@@ -138,7 +138,7 @@ const mockErr = (code?: string | number) =>
 
 test('cloneRepo: errors when Git is not installed on PATH', async t => {
   const error = await t.throws(
-    cloneRepo(mockErr('ENOENT'))({ repo: 'r', branch: 'b' }, 'd', 'p')
+    cloneRepo(mockErr('ENOENT'))({ repo: 'r', branch: '.' }, 'd', 'p')
   );
   t.regex(error.message, /Git is not installed on your PATH/);
 });