A powershell function to delete pushed branches from a local git repo

clean-branches.ps1

function clean-branches([Switch]$d = $false) {
   if (-not $d) {
      Write-Host "Dry-Run, would delete:"
   }

   git branch -vv | where {$_ -match '\[origin/.*: gone\]'} | foreach {
      $branch = $_.split(" ", [StringSplitOptions]'RemoveEmptyEntries')[0]
      if ($d) {
         git branch -D ($branch)
      } else {
         Write-Host $branch
      }
   }
}