$ git clone -n https://github.com/xcp-ng-rpms/xcp-ng-release /var/lib/mock/v8.3-u-pcoval1-9728-28440/root/chroot_tmpdir/scmroot/xcp-ng-release
Cloning into '/var/lib/mock/v8.3-u-pcoval1-9728-28440/root/chroot_tmpdir/scmroot/xcp-ng-release'...
$ git fetch origin 32578ddaf8fd81b1942a717ccc26d7f9a56d98e9:KOJI_FETCH_HEAD
From https://github.com/xcp-ng-rpms/xcp-ng-release
 * [new ref]         32578ddaf8fd81b1942a717ccc26d7f9a56d98e9 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 32578dd bump release for test build