This gist depicts the programmatic steps for integrating Gdrive with Collaboratory and authenticating

gdrive_gcolab_git.py

from google.colab import drive
drive.mount('/content/gdrive')

%cd /content/gdrive/MyDrive/folder_name
/content/gdrive/MyDrive/folder_name

!git init

!git remote add origin https://githubUserName:githubPassword@github.com/username/repo_name.git

!git config --global user.email 'email_id'
!git config --global user.name 'user_name'

!git add .
!git commit -m 'First commit'

!git push origin master