How to force GitHub Pages build?

Question

Every GitHub repository can have (or be) a GitHub Pages website, that can be built with Jekyll. GitHub builds the site every time you push a new commit.
Is there a way t

Answer 1

Now that GitHub Actions are available, this is trivial to do:

# File: .github/workflows/refresh.yml
name: Refresh

on:
  schedule:
    - cron:  '0 3 * * *' # Runs every day at 3am

jobs:
  refresh:
    runs-on: ubuntu-latest
    steps:
      - name: Trigger GitHub pages rebuild
        run: |
          curl --fail --request POST \
            --url https://api.github.com/repos/${{ github.repository }}/pages/builds \
            --header "Authorization: Bearer $USER_TOKEN"
        env:
          # You must create a personal token with repo access as GitHub does
          # not yet support server-to-server page builds.
          USER_TOKEN: ${{ secrets.USER_TOKEN }}

Sample repo that does this: https://github.com/SUPERCILEX/personal-website/actions

Pages API: https://developer.github.com/v3/repos/pages/#request-a-page-build