$ git clone -n https://src.fedoraproject.org/rpms/rust-async-stream-impl.git /var/lib/mock/f38-build-side-42-init-devel-1395251-31050/root/chroot_tmpdir/scmroot/rust-async-stream-impl
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-1395251-31050/root/chroot_tmpdir/scmroot/rust-async-stream-impl'...
$ git fetch origin e6932840b6725475dc812ea88885be1d9c1a2081:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-async-stream-impl
 * [new ref]         e6932840b6725475dc812ea88885be1d9c1a2081 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e693284 Update to version 0.3.5; Fixes RHBZ#2184740