$ git clone -n https://src.fedoraproject.org/rpms/mingw-opencv.git /var/lib/mock/f42-build-3340318-44983/root/chroot_tmpdir/scmroot/mingw-opencv
Cloning into '/var/lib/mock/f42-build-3340318-44983/root/chroot_tmpdir/scmroot/mingw-opencv'...
$ git fetch origin b5d4f8c2e7529e9c338e9f67c7412ea386a71adc:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/mingw-opencv
 * [new ref]         b5d4f8c2e7529e9c338e9f67c7412ea386a71adc -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b5d4f8c Update to 4.11.0