When full clone is too long - make a cache. You can run it with `watch -n 1 ./git-cache.sh git@github.com:Username/RepoName`, it will create cached version on /tmp/git-cache/git@github.com:Username/Reponame so you can clone new repos from there. Good when you make many clones and it's slow. Add apriopriate remotes when needed.

git-cache.sh

cache_dir="/tmp/git-cache/"
if [ ! -d "$cache_dir" ]
then
  mkdir -p $cache_dir
fi
cache_path=$cache_dir$1
if [ ! -d "$cache_path" ]
then
  git clone --mirror $1 $cache_path
else
  echo "cache seems to exist already, go with the update\n"
  cd $cache_path
  git remote update
fi
echo "your cache is available and updated at $cache_path"