$ git clone -n https://src.fedoraproject.org/rpms/motif.git /var/lib/mock/f42-build-882746-184577/root/chroot_tmpdir/scmroot/motif
Cloning into '/var/lib/mock/f42-build-882746-184577/root/chroot_tmpdir/scmroot/motif'...
$ git fetch origin 99ef8dd9273f350b3fb93c2f926efe2e6d3a7dcb:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/motif
 * [new ref]         99ef8dd9273f350b3fb93c2f926efe2e6d3a7dcb -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 99ef8dd cleanup, fix FTBFS