$ git clone -n https://src.fedoraproject.org/rpms/ibus.git /var/lib/mock/f41-build-855885-167429/root/chroot_tmpdir/scmroot/ibus
Cloning into '/var/lib/mock/f41-build-855885-167429/root/chroot_tmpdir/scmroot/ibus'...
$ git fetch origin d4d49e135913b8df522067219d87888d80735a66:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ibus
 * [new ref]         d4d49e135913b8df522067219d87888d80735a66 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d4d49e1 Use va_marshaller to avoid GValue boxing