r-cran-sna is suggested by r-cran-blockmodeling, the other two packages are dependencies of it.
gbp clone git@salsa.debian.org:r-pkg-team/r-cran-statnet.common.git
gbp clone git@salsa.debian.org:r-pkg-team/r-cran-network.git
gbp clone git@salsa.debian.org:r-pkg-team/r-cran-sna.git
Thanks!