$ git clone -n https://github.com/xcp-ng-rpms/ldns.git /var/lib/mock/v8.3-incoming-9955-28628/root/chroot_tmpdir/scmroot/ldns
Cloning into '/var/lib/mock/v8.3-incoming-9955-28628/root/chroot_tmpdir/scmroot/ldns'...
$ git fetch origin b43aca53a9ff52d756c50d3d71198d3ef6449110:KOJI_FETCH_HEAD
From https://github.com/xcp-ng-rpms/ldns
 * [new ref]         b43aca53a9ff52d756c50d3d71198d3ef6449110 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b43aca5 spec: Rebuild for openssl-3