$ git clone -n https://src.fedoraproject.org/rpms/libreoffice.git /var/lib/mock/f39-build-1806692-41820/root/chroot_tmpdir/scmroot/libreoffice
Cloning into '/var/lib/mock/f39-build-1806692-41820/root/chroot_tmpdir/scmroot/libreoffice'...
$ git fetch origin 4d5b9e4cdd148cf6532c0856391fafd4b41184ef:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libreoffice
 * [new ref]         4d5b9e4cdd148cf6532c0856391fafd4b41184ef -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4d5b9e4 libcmis rebuild.