$ git clone -n https://src.fedoraproject.org/rpms/openoffice.org-diafilter.git /var/lib/mock/f39-build-1769840-41501/root/chroot_tmpdir/scmroot/openoffice.org-diafilter
Cloning into '/var/lib/mock/f39-build-1769840-41501/root/chroot_tmpdir/scmroot/openoffice.org-diafilter'...
$ git fetch origin 379dff0de83385819de40e6faa07925017ce6ae1:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/openoffice.org-diafilter
 * [new ref]         379dff0de83385819de40e6faa07925017ce6ae1 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 379dff0 Only build on architectures with Java available