The other day I was working on a project where we wanted to do static programming analysis for each push then save the results of the analysis to another branch.

I came up with this solution for the workflows/*.yml file

name: GitHub Python Analysis Action
run-name: ${{ github.actor }} is testing python
on: [push]

jobs:
  Python-Analysis-Actions:
    runs-on: ubuntu-latest

    steps: 
    - uses: actions/checkout@v2
    - name: Set analysis file name
      run:
        echo "ANALYSIS_FILE_NAME=${{ github.sha }}-analysis.txt" >> $GITHUB_ENV
    - name: Set up Python
      uses: actions/setup-python@v1
      with:
        python-version: '3.x'
    - name: Install dependencies
      run: |
        ls
        python -m pip install --upgrade pip
        pip install -r .github/workflows/github-actions-py/requirements.txt 
        python .github/workflows/github-actions-py/analysis.py > ../$ANALYSIS_FILE_NAME
        ls

    - name: Commit files
      id: commit
      run: |
        git config --local user.email "action@github.com"
        git config --local user.name "github-actions"
        git fetch
        git branch -a
        git switch -c analysis remotes/origin/analysis
        git pull
        mv ../$ANALYSIS_FILE_NAME ./$ANALYSIS_FILE_NAME
        git add --all
        if [-z "$(git status --porcelain)"]; then
           echo "::set-output name=push::false"
        else
           git commit -m "Add changes" -a
           echo "::set-output name=push::true"
        fi
      shell: bash
    - name: Push changes
      if: steps.commit.outputs.push == 'true'
      uses: ad-m/github-push-action@master
      with:
         github_token: ${{ secrets.GITHUB_TOKEN }}
         branch: analysis

Each time a person pushes to the main branch a commit is made to the analysis branch which takes the form <git hash number>-analysis.txt. This way the analysis files can be used later for a report.

There are probably better ways to generate reports but this is an interesting case study in how to push to one branch based on pushes to another branch.

If you are interested in the source code check out the Github