Merge two repositories maintaining history

merge.sh

git clone git@bitbucket.org:exolever/exolever.git
git clone git@bitbucket.org:exolever/exo-services.git

cd exolever
mkdir service-exo-core
git mv !(service-exo-core) service-exo-core
git commit -a -S -m "Moving exolever into its own subdirectory (service-exo-core)"

cd ../exo-services
git remote add exolever ../service-exo-core
git fetch exolever
git checkout -b feature/merge-exolever
git merge -S --allow-unrelated-histories exolever/master
git push origin feature/merge-exolever
git remote rm exolever