$ git clone -n https://github.com/xcp-ng-rpms/xcp-ng-xapi-plugins.git /var/lib/mock/v8.3-incoming-8833-27776/root/chroot_tmpdir/scmroot/xcp-ng-xapi-plugins
Cloning into '/var/lib/mock/v8.3-incoming-8833-27776/root/chroot_tmpdir/scmroot/xcp-ng-xapi-plugins'...
$ git fetch origin c1c45ed8861d62e40771e26b382aded90a7bfbcb:KOJI_FETCH_HEAD
From https://github.com/xcp-ng-rpms/xcp-ng-xapi-plugins
 * [new ref]         c1c45ed8861d62e40771e26b382aded90a7bfbcb -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c1c45ed Update to v1.14.0