$ git clone -n https://src.fedoraproject.org/rpms/rust-tester.git /var/lib/mock/f40-build-2652380-66894/root/chroot_tmpdir/scmroot/rust-tester
Cloning into '/var/lib/mock/f40-build-2652380-66894/root/chroot_tmpdir/scmroot/rust-tester'...
$ git fetch origin beafcab454b8ccd8589150e8a6c5d9fb9f0cad1e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-tester
 * [new ref]         beafcab454b8ccd8589150e8a6c5d9fb9f0cad1e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at beafcab Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild