$ git clone -n https://src.fedoraproject.org/rpms/libxls.git /var/lib/mock/f40-build-786118-134180/root/chroot_tmpdir/scmroot/libxls
Cloning into '/var/lib/mock/f40-build-786118-134180/root/chroot_tmpdir/scmroot/libxls'...
$ git fetch origin d1f8a145e0544d6bbcb2abf2eb354cefea7835fe:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libxls
 * [new ref]         d1f8a145e0544d6bbcb2abf2eb354cefea7835fe -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d1f8a14 Fix style check on s390x