$ git clone -n https://github.com/xcp-ng-rpms/ldns.git /var/lib/mock/v8.3-u-pcoval2-9961-28635/root/chroot_tmpdir/scmroot/ldns
Cloning into '/var/lib/mock/v8.3-u-pcoval2-9961-28635/root/chroot_tmpdir/scmroot/ldns'...
$ git fetch origin d4fd04177c1c23e7be1a0464a9ea64ee0db517fa:KOJI_FETCH_HEAD
From https://github.com/xcp-ng-rpms/ldns
 * [new ref]         d4fd04177c1c23e7be1a0464a9ea64ee0db517fa -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d4fd041 bump release for test build