'How can I add a branch from another repository to my project? (Use Pycharm)

I used the master branch of learn repository. I cloned a master branch of Pycharm on my PC. I removed the learn repository (GitHub repo(Learn): Remote Master). I pushed PC Pycharm: Local Master to GitHub repo(My): Remote Master. I need to add new files to my project that appeared in the next branch of learn repository. How can I do this using a Pycharm?

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