ci(project-root): add workflow-dispatch to python-check github-action

Author: Lee-W

.github/workflows/pushed.yaml

@@ -1,6 +1,14 @@
 name: New commit pushed and receive pull request
 
-on: [push, pull_request]
+on:
+  pull_request:
+  push:
+  workflow_dispatch:
+    inputs:
+      git_rev:
+        description: 'git revision'
+        required: false
+        default: ''
 
 jobs:
   check:
@@ -10,6 +18,7 @@ jobs:
         uses: actions/checkout@v2
         with:
           fetch-depth: 0
+          ref: '${{ github.event.inputs.git_rev }}'
 
       - name: Set up Python 3.7
         uses: actions/setup-python@v1