$ git clone -n https://src.fedoraproject.org/rpms/chess_db.git /var/lib/mock/f45-build-3902-329/root/chroot_tmpdir/scmroot/chess_db
Cloning into '/var/lib/mock/f45-build-3902-329/root/chroot_tmpdir/scmroot/chess_db'...
$ git fetch origin 5bf5cec89335a55fb61401c7ce1a308b3ccd06ec:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/chess_db
 * [new ref]         5bf5cec89335a55fb61401c7ce1a308b3ccd06ec -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5bf5cec Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild