$ git clone -n https://src.fedoraproject.org/rpms/rust-tokio-reactor.git /var/lib/mock/f40-build-2644035-66495/root/chroot_tmpdir/scmroot/rust-tokio-reactor
Cloning into '/var/lib/mock/f40-build-2644035-66495/root/chroot_tmpdir/scmroot/rust-tokio-reactor'...
$ git fetch origin 64417949a8aa5a307644e1c9eca37b0401c89f9a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-tokio-reactor
 * [new ref]         64417949a8aa5a307644e1c9eca37b0401c89f9a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6441794 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild