Create github private fork

privateFork.sh

function private_clone() {
sourceRepo=$2
destOrg=$1
repoName=$(echo $sourceRepo | cut -d/ -f 2)
destRepo=$(echo $destOrg/$repoName)
gh repo create -y --private  $destRepo
git clone --bare git@github.com:$sourceRepo\.git
cd $repoName\.git
git push --mirror git@github.com:$destRepo
cd ..; rm -rf $repoName\.git;
}

Use as:

$ private_clone <destOrg> <sourceRepo>
# sourceRepo looks like: cli/cli