$ git clone -n https://github.com/xcp-ng-rpms/openvswitch /var/lib/mock/v8.3-incoming-10670-29220/root/chroot_tmpdir/scmroot/openvswitch
Cloning into '/var/lib/mock/v8.3-incoming-10670-29220/root/chroot_tmpdir/scmroot/openvswitch'...
$ git fetch origin dbed68cb6d068bb6beef20d68aecece029d74684:KOJI_FETCH_HEAD
From https://github.com/xcp-ng-rpms/openvswitch
 * [new ref]         dbed68cb6d068bb6beef20d68aecece029d74684 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at dbed68c Merge pull request #19 from xcp-ng-rpms/8.3-XS-1557