fast-checkout.yaml

parameters:
  folders: '*'

steps: 
- bash: |
    set -ex
    export ORIGIN=$(Build.Repository.Uri)
    export REF=$(Build.SourceVersion)
    export FOLDERS='${{ parameters.folders }}'
    git version
    git lfs version
    git init
    git sparse-checkout init --cone
    git sparse-checkout add $FOLDERS
    git remote add origin $ORIGIN
    git config core.sparsecheckout true
    git config gc.auto 0
    git config advice.detachedHead false
    git config http.version HTTP/1.1
    git lfs install --local
    git config uploadpack.allowReachableSHA1InWant true
    git config http.extraheader "AUTHORIZATION: bearer $(System.AccessToken)"
    git fetch --force --no-tags --progress --depth 1 origin $REF
    git checkout $REF --progress --force

  displayName: 'Fast sparse checkout'