$ git clone -n https://src.fedoraproject.org/rpms/rust-tokio.git /var/lib/mock/f38-build-side-42-init-devel-1146961-30463/root/chroot_tmpdir/scmroot/rust-tokio
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-1146961-30463/root/chroot_tmpdir/scmroot/rust-tokio'...
$ git fetch origin d69c0ff4c2ae80bfbaf9bbf674f47b5b6beb5241:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-tokio
 * [new ref]         d69c0ff4c2ae80bfbaf9bbf674f47b5b6beb5241 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d69c0ff Update to version 1.30.0; Fixes RHBZ#2230566