$ git clone -n https://src.fedoraproject.org/rpms/opencv.git /var/lib/mock/f41-build-1022684-18093/root/chroot_tmpdir/scmroot/opencv
Cloning into '/var/lib/mock/f41-build-1022684-18093/root/chroot_tmpdir/scmroot/opencv'...
$ git fetch origin 1d07ea89c27bfd61c32f814562be28266ab685f8:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/opencv
 * [new ref]         1d07ea89c27bfd61c32f814562be28266ab685f8 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1d07ea8 Revert "Reduce debuginfo level on i386 to avoid memory exhaustion"