$ git clone -n https://src.fedoraproject.org/rpms/rust-gufo.git /var/lib/mock/f45-build-42232-791/root/chroot_tmpdir/scmroot/rust-gufo
Cloning into '/var/lib/mock/f45-build-42232-791/root/chroot_tmpdir/scmroot/rust-gufo'...
$ git fetch origin 35ff0ca78a6ad4dbc5a0945646105ce3bbf0df37:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-gufo
 * [new ref]         35ff0ca78a6ad4dbc5a0945646105ce3bbf0df37 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 35ff0ca Update to version 0.5.0; Fixes RHBZ#2529498