The problem that I ran into (which is the same problem that @Stavarengo mentioned in this comment above) is that the default remote branch (develop in my case) had been deleted, but was still referenced in .git/refs/remotes/origin/HEAD.
In my case, the HEAD COMMIT-HASH in the file .git/refs/remotes/origin/master was empty( git told u the upstream is gone), somehow. Delete the file, and git pull again to rebuild it, follow git advise message after every git command's feedback, would probably get thing done.
Dragon Age: Origins was released over a decade ago in November of 2009 and the game has only grown in fan following and popularity. Despite two more main titles being added to the Dragon Age franchise since the series launched, Origins remains a contender for fan-favorite, and players still enjoy returning to the original adventure in Thedas.
One of the very few imperfections fans voice about the beloved original Dragon Age game is how dated it has become, with many clamoring for an official remaster. Until Bioware decides it's time to revisit Origins and give it a polish, the modding community has come to the aid of fans with the Unofficial Remaster mod.