Which remote branch is my git subtree tracking?

Suppose there is a master remote and a dev branch, and I added it to a subtree:

$ git remote add rem [URL]
$ git fetch rem
$ git subtree add -P=./sub rem/dev

      

        
        
        
      

    

Now every time I run the git subtree pull -P sub

rem / dev branch will be checked out and merged into sub. Ok

But let's say later , I forgot if I was added from the master or dev branch. Apart from the output, comparing git logs, is there a way that git will tell me which rem branch is the subtree in sub / tracking?

Counterfeits are tricky ...