$ git clone -n https://github.com/xcp-ng-rpms/intel-ixgbe /var/lib/mock/v8.3-incoming-10460-29030/root/chroot_tmpdir/scmroot/intel-ixgbe
Cloning into '/var/lib/mock/v8.3-incoming-10460-29030/root/chroot_tmpdir/scmroot/intel-ixgbe'...
$ git fetch origin cf67e5dbb070ddc2fba75874a9fc624692b46dbc:KOJI_FETCH_HEAD
From https://github.com/xcp-ng-rpms/intel-ixgbe
 * [new ref]         cf67e5dbb070ddc2fba75874a9fc624692b46dbc -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at cf67e5d Merge branch 'XS-8.3' into 8.3