Git Reset To Remote: Reset Local Repository Branch To Be Just Like Remote Repository HEAD

I did:
git reset --hard HEAD
But when I run a git status,
On branch master
Changes to be committed:
  (use "git reset HEAD ..." tounstage)

First, use git reset to reset to the previously fetched HEAD of the corresponding upstream branch:

git reset --hard @{u}

The advantage of specifying @{u} or its verbose form @{upstream} is that the name of the remote repo and branch don't have to be explicitly specified. On Windows or with PowerShell, specify "@{u}" (with double quotes).

Next, as needed, use git clean to remove untracked files, optionally also with -x:

git clean -df

Finally, as needed, get the latest changes:

git pull