$ git clone -n https://src.fedoraproject.org/rpms/rust-rd-agent-intf.git /var/lib/mock/f40-build-1924405-25102/root/chroot_tmpdir/scmroot/rust-rd-agent-intf
Cloning into '/var/lib/mock/f40-build-1924405-25102/root/chroot_tmpdir/scmroot/rust-rd-agent-intf'...
$ git fetch origin 914f7e2a50f187bfa4471e0a070d09afca64911c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-rd-agent-intf
 * [new ref]         914f7e2a50f187bfa4471e0a070d09afca64911c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 914f7e2 Rebuild for rd-util update