$ git clone -n https://src.fedoraproject.org/rpms/rust-async-std.git /var/lib/mock/f41-build-side-1-2797433-32746/root/chroot_tmpdir/scmroot/rust-async-std
Cloning into '/var/lib/mock/f41-build-side-1-2797433-32746/root/chroot_tmpdir/scmroot/rust-async-std'...
$ git fetch origin cd3e2588b580a2f046130d3a2f866eae431f843d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-async-std
 * [new ref]         cd3e2588b580a2f046130d3a2f866eae431f843d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at cd3e258 Use the current major version of async-channel