$ git clone -n https://src.fedoraproject.org/rpms/rust-futures-channel.git /var/lib/mock/f38-build-side-43-rust-devel-1415893-31455/root/chroot_tmpdir/scmroot/rust-futures-channel
Cloning into '/var/lib/mock/f38-build-side-43-rust-devel-1415893-31455/root/chroot_tmpdir/scmroot/rust-futures-channel'...
$ git fetch origin 028b262f90c239fc9dab0ad23b63aff080fa94b9:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-futures-channel
 * [new ref]         028b262f90c239fc9dab0ad23b63aff080fa94b9 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 028b262 Update to version 0.3.28; Fixes RHBZ#2183268