fix: add '--' to checkout command to avoid ambiguity

Signed-off-by: Kenji Miyake <kenji.miyake@tier4.jp>

dist/index.js

@@ -650,6 +650,8 @@ class GitCommandManager {
             else {
                 args.push(ref);
             }
+            // https://github.com/git/git/commit/a047fafc7866cc4087201e284dc1f53e8f9a32d5
+            args.push('--');
             yield this.exec(args);
         });
     }

src/git-command-manager.ts

@@ -32,6 +32,8 @@ export class GitCommandManager {
     } else {
       args.push(ref)
     }
+    // https://github.com/git/git/commit/a047fafc7866cc4087201e284dc1f53e8f9a32d5
+    args.push('--');
     await this.exec(args)
   }