$ git clone -n https://src.fedoraproject.org/rpms/pdns.git /var/lib/mock/f39-build-2421155-60579/root/chroot_tmpdir/scmroot/pdns
Cloning into '/var/lib/mock/f39-build-2421155-60579/root/chroot_tmpdir/scmroot/pdns'...
$ git fetch origin d6ae698064802c03bcf923cc0f97b02ddc2ee5c9:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/pdns
 * [new ref]         d6ae698064802c03bcf923cc0f97b02ddc2ee5c9 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d6ae698 Update to 4.8.4