Introduce orphan main branch.

Author: stellaraccident

.github/workflows/advance_forks.yml

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+# Copyright 2022 The IREE Authors
+#
+# Licensed under the Apache License v2.0 with LLVM Exceptions.
+# See https://llvm.org/LICENSE.txt for license information.
+# SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+
+name: Advance Upstream Forks
+
+on:
+  schedule:
+    # Every hour
+    - cron: "0 * * * *"
+
+  workflow_dispatch:
+
+jobs:
+  advance_torch_mlir:
+    name: "Advance torch-mlir"
+    runs-on: ubuntu-22.04
+    permissions:
+      contents: write
+    steps:
+      - name: Checking out repository
+        uses: actions/checkout@v3
+        with:
+          ref: main
+
+      - name: Pull from upstream
+        run: |
+          git remote add upstream https://github.com/llvm/torch-mlir.git
+          git pull --ff-only upstream main
+      - name: Pushing changes
+        run: |
+          git push

README.md

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+This is a fork of torch-mlir for maintaining patches.