$ git clone -n https://src.fedoraproject.org/rpms/rust-tokio.git /var/lib/mock/f38-build-side-43-rust-devel-1407237-31293/root/chroot_tmpdir/scmroot/rust-tokio
Cloning into '/var/lib/mock/f38-build-side-43-rust-devel-1407237-31293/root/chroot_tmpdir/scmroot/rust-tokio'...
$ git fetch origin e9f09ff5ac002ca491750f4109f507c9da3851cc:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-tokio
 * [new ref]         e9f09ff5ac002ca491750f4109f507c9da3851cc -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e9f09ff Update to version 1.33.0; Fixes RHBZ#2242843