$ git clone -n https://src.fedoraproject.org/rpms/dnsviz.git /var/lib/mock/f40-build-1944921-25179/root/chroot_tmpdir/scmroot/dnsviz
Cloning into '/var/lib/mock/f40-build-1944921-25179/root/chroot_tmpdir/scmroot/dnsviz'...
$ git fetch origin 8c0bfbe40072127a2cd1653636cf9ef027b4097e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/dnsviz
 * [new ref]         8c0bfbe40072127a2cd1653636cf9ef027b4097e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8c0bfbe Modernize python packaging