$ git clone -n https://github.com/xcp-ng-rpms/xcp-ng-xapi-plugins.git /var/lib/mock/v8.3-incoming-9482-28216/root/chroot_tmpdir/scmroot/xcp-ng-xapi-plugins
Cloning into '/var/lib/mock/v8.3-incoming-9482-28216/root/chroot_tmpdir/scmroot/xcp-ng-xapi-plugins'...
$ git fetch origin 7aecbbade747718b34dd934a2c209f22eb2c3105:KOJI_FETCH_HEAD
From https://github.com/xcp-ng-rpms/xcp-ng-xapi-plugins
 * [new ref]         7aecbbade747718b34dd934a2c209f22eb2c3105 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7aecbba Merge pull request #18 from xcp-ng-rpms/dml-sdncontroller-rework