$ git clone -n https://src.fedoraproject.org/rpms/opencv.git /var/lib/mock/f31-build-65748-29758/root/thebuilddir/tmp/scmroot/opencv
Cloning into '/var/lib/mock/f31-build-65748-29758/root/thebuilddir/tmp/scmroot/opencv'...
$ git reset --hard eefb8f5021917da8b4d3b985652735a9ce3d109e
HEAD is now at eefb8f5 Rebuild for coin-or package updates.