$commitOffset = 1
$additionThreshold = 50
$commits = git diff HEAD HEAD~$commitOffset --numstat | ConvertFrom-Csv -Header 'Additions','Deletions','File' -Delimiter "`t"
$commits = $commits | ? {$_.Additions -ne '-' -and $_.Additions -ne '0'}
$commits | % { $_.Additions = [int]$_.Additions; $_.Deletions = [int]$_.Deletions }
$commits = $commits | ? {($_.Additions - $_.Deletions_) -gt $additionThreshold}