jason@jason-AY597AA-ABA-HPE-110f:~/Downloads/tmwa-server-data-master$ git fetch upstream
fatal: 'upstream' does not appear to be a git repository
fatal: Could not read from remote repository.

Please make sure you have the correct access rights
and the repository exists.
jason@jason-AY597AA-ABA-HPE-110f:~/Downloads/tmwa-server-data-master$ git checkout master
D	world/map/npc/018-1/miners.txt~
Already on 'master'
jason@jason-AY597AA-ABA-HPE-110f:~/Downloads/tmwa-server-data-master$ git reset --hard upstream/master
fatal: ambiguous argument 'upstream/master': unknown revision or path not in the working tree.
Use '--' to separate paths from revisions, like this:
'git <command> [<revision>...] -- [<file>...]'
jason@jason-AY597AA-ABA-HPE-110f:~/Downloads/tmwa-server-data-master$