$ git clone -n https://src.fedoraproject.org/rpms/rust-num-derive.git /var/lib/mock/f45-build-43454-803/root/chroot_tmpdir/scmroot/rust-num-derive
Cloning into '/var/lib/mock/f45-build-43454-803/root/chroot_tmpdir/scmroot/rust-num-derive'...
$ git fetch origin e0a735e97db5bb0d9e606a20785b0e8aa08c7515:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-num-derive
 * [new ref]         e0a735e97db5bb0d9e606a20785b0e8aa08c7515 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e0a735e Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild