$ git clone -n https://github.com/xcp-ng-rpms/chrony /var/lib/mock/v8.3-incoming-10715-29267/root/chroot_tmpdir/scmroot/chrony
Cloning into '/var/lib/mock/v8.3-incoming-10715-29267/root/chroot_tmpdir/scmroot/chrony'...
$ git fetch origin 0356237d85595e89e4e547f7891b40c1fd64e7bd:KOJI_FETCH_HEAD
From https://github.com/xcp-ng-rpms/chrony
 * [new ref]         0356237d85595e89e4e547f7891b40c1fd64e7bd -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0356237 Set vendorzone to xcp-ng