$ git clone -n https://src.fedoraproject.org/rpms/player.git /var/lib/mock/f39-build-2456642-61439/root/chroot_tmpdir/scmroot/player
Cloning into '/var/lib/mock/f39-build-2456642-61439/root/chroot_tmpdir/scmroot/player'...
$ git fetch origin 6a086a22735a4f95a44167450a0ca9c2eaae5ef9:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/player
 * [new ref]         6a086a22735a4f95a44167450a0ca9c2eaae5ef9 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6a086a2 Rebuild for opencv 4.8.0