https://stackoverflow.com/a/18718936/1440095
notepad $PROFILE
function git-clear { git fetch --prune | git branch -vv | findstr 'origin/.+: gone]' | %{ $.Split(' ')[2] } | % { git branch -D $ } }
New-Alias -Name gcl -Value git-clear
// Source: http://erikaybar.name/git-deleting-old-local-branches/