$ git clone -n https://src.fedoraproject.org/rpms/rust-tokio-timer.git /var/lib/mock/f40-build-2131093-50797/root/chroot_tmpdir/scmroot/rust-tokio-timer
Cloning into '/var/lib/mock/f40-build-2131093-50797/root/chroot_tmpdir/scmroot/rust-tokio-timer'...
$ git fetch origin 9c4bc38ace56862e0ad1aee7a226b1a815e48c9a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-tokio-timer
 * [new ref]         9c4bc38ace56862e0ad1aee7a226b1a815e48c9a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9c4bc38 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild