Recursively fetch all forks for a git repo

fetch_forks.ps1

function Get-BasicAuthCreds {
    param([string]$Username,[string]$Password)
    $AuthString = "{0}:{1}" -f $Username,$Password
    $AuthBytes  = [System.Text.Encoding]::Ascii.GetBytes($AuthString)
    return [Convert]::ToBase64String($AuthBytes)
}

function fetch-forks ($orig, $Creds) {
  #Write-host $orig.forks_url
  #Write-host $Creds
  if ([String]::IsNullOrWhitespace($orig.forks_url) -eq $false) {
	  $d = Invoke-RestMethod -Uri $($orig.forks_url) -Headers @{"Authorization"="Basic $Creds"}
	  #Write-host "next"
	  $d |% {
		$r = [ordered]@{
		  clone_url=$_.clone_url;
		  forks_url=$_.forks_url;
		  owner=$("{0}{1}-" -f $orig.owner, $_.owner.login);
		}
		$r
		fetch-forks $r $Creds
	  }
  }
}

$token = # enter git personal access token with public repo and user read rights
$user = # enter git username
$BasicCreds = Get-BasicAuthCreds -Username $user -Password $token

# confirm that you are auth'd correctly and the rate limits are maxed
Invoke-RestMethod https://api.github.com/rate_limit -Headers @{"Authorization"="Basic $BasicCreds"}

$o = [ordered]@{
  forks_url= # enter the top-level repo forks url. e.g. "https://api.github.com/repos/AGBrown/pouchdb.d.ts/forks"; 
  owner="";
  }

$data = fetch-forks $o $BasicCreds

# add remotes and fetch them
$data |% {
  $nm = $($_.owner.TrimEnd("-"))
  git remote add $nm $_.clone_url
  git fetch $nm
}