use HTTPS to clone a package from Bioconductor git
getpk(x, branch = "RELEASE_3_15", nuke_inst_doc = TRUE)
character(1) package name expected to be a Bioconductor package in git
character(1) "RELEASE_3_15" is default
logical(1) defaults to TRUE ... to avoid pkgbuild::build query, remove inst/doc
result of system()
Oct 2022 added --depth 1 to git clone command