$ git clone -n https://src.fedoraproject.org/rpms/rust-rustfft.git /var/lib/mock/f38-build-side-43-rust-devel-1416022-31457/root/chroot_tmpdir/scmroot/rust-rustfft
Cloning into '/var/lib/mock/f38-build-side-43-rust-devel-1416022-31457/root/chroot_tmpdir/scmroot/rust-rustfft'...
$ git fetch origin 90deb2783fb5a2e38b8aa180b9ad36abadf58f59:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-rustfft
 * [new ref]         90deb2783fb5a2e38b8aa180b9ad36abadf58f59 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 90deb27 Rebuilt for https://fedoraproject.org/wiki/Fedora_38_Mass_Rebuild