Bitbucket to GitHub with Branches and Tags

1) Create a new folder for the fresh repo clones. Navigate inside.

mkdir temp/
cd temp/

2) Clone the repo using the following command.

git clone --mirror git@bitbucket.com:org/name.git

3) Navigate into the locally cloned repo.

cd name.git/

4) Set the new remote

git remote set-url --push origin git@github.com:org/name.git

5) Push the contents of the repo to the new remote.

git push --mirror

Enjoy!