How to delete accidental push which creates two "Create pull request"?

[marshallmidden]

I accidentally did (instead of "git push origin bugfix/m4-built-v5-8-16-kernel"):

# git push

warning: push.default is unset; its implicit value is changing in

...

remote: To ssh://git@172.22.1.234:7999/pe/enterprise.git9cdb029..4426710 bugfix/PE-3894-lshell-help-help-etc -> bugfix/PE-3894-lshell-help-help-etc0814ad0..82cc05e bugfix/m4-built-v58-kernel-upgrade -> bugfix/m4-built-v58-kernel-upgrade! [rejected] bugfix/PE-3425-kernel-crash-dump-2 -> bugfix/PE-3425-kernel-crash-dump-2 (non-fast-forward)

...

The two "Create pull request" entries. How do I remove/delete/git-rid-of them?

Apologies for the cut and paste not displaying correctly. It basically did two pushes and rejected four.