$ git clone -n http://fedora.riscv.rocks:3000/rpms/opencv.git /var/lib/mock/f40-build-789033-135492/root/chroot_tmpdir/scmroot/opencv
Cloning into '/var/lib/mock/f40-build-789033-135492/root/chroot_tmpdir/scmroot/opencv'...
$ git fetch origin 3923e8e37eb9e4a6f5a72df1f9c77f6f0fec8645:KOJI_FETCH_HEAD
From http://fedora.riscv.rocks:3000/rpms/opencv
 * [new ref]         3923e8e37eb9e4a6f5a72df1f9c77f6f0fec8645 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3923e8e Merge remote-tracking branch 'up/main' into main-riscv64