`git fetch origin master：master`是什么意思？

Question

What does git fetch origin master:master mean?

I mean the master:master part: I know what git fetch origin means, but what about the master:master part?

Answer 1

The arguments after the remote ( origin ) are refspecs .

Using master:master will overwrite your master branch; see this answer .

See this answer for even more about git fetch 's behavior with and without refspec arguments.