moving directories from one repo to another

move_to_another_repo.sh

# clone repos
mkdir move-repo && cd move-repo/
git clone <repo-src>
git clone <repo-dst>

# prepare source
cd repo-src
#git checkout <branch-in-repo-src>  # optional
#git remote rm origin               # optional
git filter-branch --subdirectory-filter <directory-to-move> -- --all
mkdir new-dir/
git mv -k * new-dir/
git commit -m "collect data and history to move"

# prepare destination
cd ../repo-dst
git remote add repo-src ../repo-src/
git fetch repo-src
git branch repo-src remotes/repo-src/master
git merge repo-src --allow-unrelated-histories

# either
git push origin master
# or
git checkout -b <branch-name>
git rebase origin/master
git push & pull request :)