how to fetch the remote repository of a remote repository which is not checked out in git

Is there a way to fetch the remote repository of a non-checked-out remote repository with git? I have the dotfiles on my remote PC under version control (using [yadm](https://yadm.io/)) . This repository is cloned on my local PC (also using yadm). But on my local PC I'm using a different dotfiles management utility ([rcm](https://github.com/thoughtbot/rcm)) which allows for more flexibility. Since yadm and rcm work on a different basis (symlinks to ~ vs. bare git into ~) I have to jump through hoops to try stuff using yadm on my local PC: * unlink my current symlink-dotfiles with rcm * checkout the yadm-repository To undo that I then have to * remove all the files which were cloned when checking out the yadm-repository * symlink the files with rcm This is annoying. Therefore I cloned the local clone of my yadm-repository into a different folder. While I'm able to see all the remotes in my local main yadm-repository, I'm only able to fetch HEAD in the cloned yadm-repository. It looks like that:

remote PC (1):                    commit a (old, not checked out), commit b (HEAD -> master)
local  PC - main repository (2):  commit a (HEAD -> master), commit b (origin/master, not checked out)
local  PC - other repository (3): commit a (HEAD -> master), commit a origin/master

So on my repository 3 I'm only able to see the commit a (which is checked out in repository 2), but not commit b (which is not checked out in repository 2, but should be available there). My question is now: how can I get commit b in my repository 3 and why doesn't that work by just git fetching everything? ----- Update 1: Minor edits to the text were performed to (hopefully) make the issue clearer.