$ git clone -n https://src.fedoraproject.org/rpms/pdns.git /var/lib/mock/f39-build-2136370-50818/root/chroot_tmpdir/scmroot/pdns
Cloning into '/var/lib/mock/f39-build-2136370-50818/root/chroot_tmpdir/scmroot/pdns'...
$ git fetch origin 8287bf58e7c51fb56309b501848f047ef0cef6e6:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/pdns
 * [new ref]         8287bf58e7c51fb56309b501848f047ef0cef6e6 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8287bf5 Update to 4.8.3