$ git clone -n https://src.fedoraproject.org/rpms/river.git /var/lib/mock/f40-build-2413191-60564/root/chroot_tmpdir/scmroot/river
Cloning into '/var/lib/mock/f40-build-2413191-60564/root/chroot_tmpdir/scmroot/river'...
$ git fetch origin 18042ebaa00233c1553ff53a9cbe73bbfef2c2ec:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/river
 * [new ref]         18042ebaa00233c1553ff53a9cbe73bbfef2c2ec -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 18042eb Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild