$ git clone -n https://src.fedoraproject.org/rpms/opencv.git /var/lib/mock/f42-build-side-1-3587408-46931/root/chroot_tmpdir/scmroot/opencv
Cloning into '/var/lib/mock/f42-build-side-1-3587408-46931/root/chroot_tmpdir/scmroot/opencv'...
$ git fetch origin 12c310ffa4ce3a52bb13c7c41293c193dc2ca017:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/opencv
 * [new ref]         12c310ffa4ce3a52bb13c7c41293c193dc2ca017 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 12c310f Use Qt6 in highgui and cvv