$ git clone -n https://src.fedoraproject.org/rpms/opencv.git /var/lib/mock/f31-build-109025-33890/root/chroot_tmpdir/scmroot/opencv
Cloning into '/var/lib/mock/f31-build-109025-33890/root/chroot_tmpdir/scmroot/opencv'...
$ git reset --hard 7ceebee30f29f60c7621d9c8a6066dac59d037af
HEAD is now at 7ceebee - Rebuilt for https://fedoraproject.org/wiki/Fedora_31_Mass_Rebuild