$ git clone -n https://src.fedoraproject.org/rpms/libreoffice.git /var/lib/mock/f38-build-side-42-init-devel-571738-25913/root/chroot_tmpdir/scmroot/libreoffice
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-571738-25913/root/chroot_tmpdir/scmroot/libreoffice'...
$ git fetch origin b87d08067cb03e5727b064b2d021c10e4cdc9ce2:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libreoffice
 * [new ref]         b87d08067cb03e5727b064b2d021c10e4cdc9ce2 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b87d080 Merge branch 'rawhide' into f38