$ git clone -n https://src.fedoraproject.org/rpms/rust-serde_fmt.git /var/lib/mock/f40-build-2653727-66903/root/chroot_tmpdir/scmroot/rust-serde_fmt
Cloning into '/var/lib/mock/f40-build-2653727-66903/root/chroot_tmpdir/scmroot/rust-serde_fmt'...
$ git fetch origin 62e0cec38df225e85cf56ca85f5e0a31b85c0386:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-serde_fmt
 * [new ref]         62e0cec38df225e85cf56ca85f5e0a31b85c0386 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 62e0cec Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild