$ git clone -n https://src.fedoraproject.org/rpms/QXlsx.git /var/lib/mock/f41-build-847689-164042/root/chroot_tmpdir/scmroot/QXlsx
Cloning into '/var/lib/mock/f41-build-847689-164042/root/chroot_tmpdir/scmroot/QXlsx'...
$ git fetch origin bf27f372fdd040814f96520cf2d283f4cc908e7d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/QXlsx
 * [new ref]         bf27f372fdd040814f96520cf2d283f4cc908e7d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at bf27f37 1.4.9