比较 2 个不同 github 回购中的 2 个文件

Comparing 2 files in 2 different github repos

有没有办法比较具有不同文件夹名称的 2 个不同 github 存储库中的 2 个文件?

github repo 1
a/
   1.txt

github repo 2
b/
   1.txt

正在研究使用 git diff 但似乎不可能

尝试使用 git diff 命令

git diff --no-index repo1/a repo2/b

git diff --no-index [--options] [--] [<path>…​]
This form is to compare the given two paths on the filesystem. 
You can omit the --no-index option when running the command in a working
tree controlled by Git and at least one of the paths points outside 
the working tree, or when running the command outside a working tree 
controlled by Git.