Fix git reset command to include remote default branch

[giordano]

Description

git reset --hard <remote> isn't a correct command, the argument of git reset must be a tree-ish, which a remote name alone isn't.

In some cases this command fails with

fatal: ambiguous argument 'origin': unknown revision or path not in the working tree.
Use '--' to separate paths from revisions, like this:
'git <command> [<revision>...] -- [<file>...]'

Notes for Reviewers

Signed commits

• Yes, I signed my commits.

[sgoggins]

This is a GREAT catch! ... @MoralCode : I think this could be one small thing that fixes a few repos that appear stuck; Though my testing is showing mostly the large repos just take large time.

[MoralCode]

Looks good to me, basic testing seems to suggest this at least doesnt cause any adverse effects (and @giordano has tested it on their system too).