Migrate one git repo to another

gitmigrate.sh

# Migrate a repository from one git source to another
# Usage: gitmigrate <first_repo_url> <new_repo_url>
gitmigrate() {
        oldrepo=$1
        newrepo=$2

        echo Migrating from $oldrepo to $newrepo

        # Pull down the repository
        git clone $oldrepo repo
        cd repo

        # Snag all the branches in the repo
        for branch in $(git branch --all | grep '^\s*remotes' | egrep --invert-match '(:?HEAD|master)$'); do
                git branch --track "${branch##*/}" "$branch"
        done

        # Get all the tags
        git fetch --tags

        # Add the remote repo
        git remote add gh $newrepo

        # Push all the branches and tags to the new repo
        git push gh --all
        git push gh --tags

        # Clean up
        cd ..
        rm -rf repo
}