$ git clone -n https://src.fedoraproject.org/rpms/rust-match_cfg.git /var/lib/mock/f40-build-2714241-72271/root/chroot_tmpdir/scmroot/rust-match_cfg
Cloning into '/var/lib/mock/f40-build-2714241-72271/root/chroot_tmpdir/scmroot/rust-match_cfg'...
$ git fetch origin b29f5063af56e5d6afe8ace872e32b54a2c7fe8d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-match_cfg
 * [new ref]         b29f5063af56e5d6afe8ace872e32b54a2c7fe8d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b29f506 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild