$ git clone -n https://src.fedoraproject.org/rpms/player.git /var/lib/mock/f42-build-3403677-45135/root/chroot_tmpdir/scmroot/player
Cloning into '/var/lib/mock/f42-build-3403677-45135/root/chroot_tmpdir/scmroot/player'...
$ git fetch origin 859376e90e3c8388462d50e8a79e30ea9738b093:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/player
 * [new ref]         859376e90e3c8388462d50e8a79e30ea9738b093 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 859376e Rebuild for opencv-4.11.0