$ git clone -n https://src.fedoraproject.org/rpms/rust-async-io.git /var/lib/mock/f39-build-2272387-54915/root/chroot_tmpdir/scmroot/rust-async-io
Cloning into '/var/lib/mock/f39-build-2272387-54915/root/chroot_tmpdir/scmroot/rust-async-io'...
$ git fetch origin ad8c966bc8b2212d6a42f40faf52b0147d0e369f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-async-io
 * [new ref]         ad8c966bc8b2212d6a42f40faf52b0147d0e369f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ad8c966 Update to version 2.2.2; Fixes RHBZ#2244763