如果文件查看器可以使用curl，则可以使用gh api获取文件的内容URL，并将其下载，如seen here:
API_URL=https://api.github.com/repos/owner/repo/contents/path/file.ext
curl $(gh api $API_URL --jq .download_url) -o file.ext
That would simulate what raw.githubusercontent.com does.
And not just for .txt files.