$ git clone -n https://github.com/xcp-ng-rpms/broadcom-bnxt-en.git /var/lib/mock/v8.3-incoming-10358-28916/root/chroot_tmpdir/scmroot/broadcom-bnxt-en
Cloning into '/var/lib/mock/v8.3-incoming-10358-28916/root/chroot_tmpdir/scmroot/broadcom-bnxt-en'...
$ git fetch origin 74b65af1d8ca0bf2f3e7c3a71e8b52a57e64fe41:KOJI_FETCH_HEAD
From https://github.com/xcp-ng-rpms/broadcom-bnxt-en
 * [new ref]         74b65af1d8ca0bf2f3e7c3a71e8b52a57e64fe41 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 74b65af Merge pull request #3 from xcp-ng-rpms/8.3-import_broadcom-bnxt-en-1.10.3_237.1.20.0-8.1.xs8.src.rpm