$ git clone -n https://src.fedoraproject.org/rpms/ldns.git /var/lib/mock/f41-build-816979-150570/root/chroot_tmpdir/scmroot/ldns
Cloning into '/var/lib/mock/f41-build-816979-150570/root/chroot_tmpdir/scmroot/ldns'...
$ git fetch origin f75554aaf281125877b0ce81e8466e5c9bb2d7d2:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ldns
 * [new ref]         f75554aaf281125877b0ce81e8466e5c9bb2d7d2 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f75554a Perl 5.40 rebuild