$ git clone -n https://src.fedoraproject.org/rpms/opencv.git /var/lib/mock/f40-build-2265616-54613/root/chroot_tmpdir/scmroot/opencv
Cloning into '/var/lib/mock/f40-build-2265616-54613/root/chroot_tmpdir/scmroot/opencv'...
$ git fetch origin 8a7b9073531eb9da676d0bb95a075cc8fb45a870:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/opencv
 * [new ref]         8a7b9073531eb9da676d0bb95a075cc8fb45a870 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8a7b907 Rebuilt for TBB 2021.11