$ git clone -n https://src.fedoraproject.org/rpms/mozc.git /var/lib/mock/f41-build-856515-167647/root/chroot_tmpdir/scmroot/mozc
Cloning into '/var/lib/mock/f41-build-856515-167647/root/chroot_tmpdir/scmroot/mozc'...
$ git fetch origin 0f215140039f4552053b6539efebaa9ca9f61a0b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/mozc
 * [new ref]         0f215140039f4552053b6539efebaa9ca9f61a0b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0f21514 Backport a patch to fix key event behavior with modifier keys.