When I merge a pull request, currently there are a few pull request merge strategies I can use, but one super-helpful option is missing:

The capability to have the merge update the commit's timestamp to the current time when I run the merge. I would want the resulting commit hash to be associated with the pull request so it's all traceable.

I imagine this would be a simple checkbox with "Update Commit Timestamp?" next to it. All it has to do is run something like: 

GIT_COMMITTER_DATE="$(date)" git commit --amend --no-edit --date "$(date)"