Suppose it's named MY_REPO
!git config --global user.email '<USER_EMAIL>'
!git config --global user.name '<USER_NAME>'
!git clone https://<USER_NAME>:<ACCESS_TOKEN>@github.com/<USER_NAME>/<MY_REPO>
!cp -R {SOURCE_DIR} /content/<MY_REPO>
%cd <MY_REPO>
!git add --all
!git status
!git commit -m ''
!git push