How to change the sitename setting with Pelican?

Question

I'm a new learner of Pelican.

I have created my personal website including basic settings and some pages by using Pelican, and the following hierarchy has already existed on the local PC:

myblog/
├── author
├── content              # Content file (Push on GitHub)
│   └── (pages)
├── output
├── theme
├── develop_server.sh
├── fabfile.py
├── Makefile
├── pelicanconf.py       # Main settings file 
└── publishconf.py  

Unfortunately, I set the wrong sitename from the beginning when I install Pelican. Right now I'm struggling to change the incorrect sitename from "test" to "XXX's blog". I can rewrite sitename directly in the document called pelicanconf.py. But after that, there's no way to push it on GitHub. So the appearance of my website remains stable.

The only thing I could do is to update the page content again and again, but not the sitename. Because only the content folder is synchronized with my remote GitHub repository. Is there anyway to change the sitename setting?