$ git clone -n https://src.fedoraproject.org/rpms/libreoffice.git /var/lib/mock/f40-build-1507210-23890/root/chroot_tmpdir/scmroot/libreoffice
Cloning into '/var/lib/mock/f40-build-1507210-23890/root/chroot_tmpdir/scmroot/libreoffice'...
$ git fetch origin 800c6e8dda263e3e736dee720acb5c68176fd6cf:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libreoffice
 * [new ref]         800c6e8dda263e3e736dee720acb5c68176fd6cf -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 800c6e8 Merge branch 'rawhide' into f40