$ git clone -n https://src.fedoraproject.org/rpms/rust-tokio-serde.git /var/lib/mock/f45-build-45520-823/root/chroot_tmpdir/scmroot/rust-tokio-serde
Cloning into '/var/lib/mock/f45-build-45520-823/root/chroot_tmpdir/scmroot/rust-tokio-serde'...
$ git fetch origin 4969beb6630cfaf9bcdbdd02868da2bb280706df:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-tokio-serde
 * [new ref]         4969beb6630cfaf9bcdbdd02868da2bb280706df -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4969beb Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild