Bug: Repo unaccessible with SSH or web after using the Fetch upstream and Merge button

To sync my fork with upstream, I used the Fetch upstream and Merge button and after that, the web page of the repo now reports 500. (One of my friends says it is fine on his computer though.) HTTPS URL cloning works but SSH URL cloning/pulling fails sometimes, reporting remote corruption like:

$ git clone git@github.com:myl7/aria2.git
Cloning into 'aria2'...
remote: fatal: bad tree object 74c97f15400503dd4b8ab497837e115de16b630d
remote: aborting due to possible repository corruption on the remote side.
fatal: early EOF
fatal: fetch-pack: invalid index-pack output
1 Like

Now after waiting for about 1 day, cloning/pulling/pushing/web has become fine again.
Hope my experience may help anyone who encounters the situation too.