Move-GitForward.ps1

function Move-GitForward (){
    param(
        [int]$commits
    )
    if (-not $commits -or $commits -lt 1) {
        $commits = 1;
    }
    git rev-parse --short HEAD `
    | Set-Variable head;

    git log --pretty=format:'%h' --branches `
    | Set-Variable allCommits;

    $currentIndex = $allCommits.IndexOf($head);
    if ($currentIndex -lt 1) {
        throw 'No commits found';
    }
    # TO move towwards the top of the list, subtract from the current index.
    $targetCommit = $allCommits[$currentIndex - $commits];

    git checkout $targetCommit
}

I like to checkout old commits and then move forward.

Standard git doesn't handle the move-forward part, so I finally wrote this little diddy.