$ git clone -n https://src.fedoraproject.org/rpms/rust-wayland-backend.git /var/lib/mock/f42-build-side-1-3588274-46944/root/chroot_tmpdir/scmroot/rust-wayland-backend
Cloning into '/var/lib/mock/f42-build-side-1-3588274-46944/root/chroot_tmpdir/scmroot/rust-wayland-backend'...
$ git fetch origin ea7ad432b6389a768e625656ad458e40244c7734:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-wayland-backend
 * [new ref]         ea7ad432b6389a768e625656ad458e40244c7734 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ea7ad43 Update to version 0.3.10; Fixes RHBZ#2362772