Un1Gfn  filed a deletion request for basys3-git :
This package is nothing but a collection of basys-3-abacus-git,
basys-3-gpio-git, basys-3-keyboard-git and basys-3-xadc-git.
Digilent, the upstream, has apparently given up this repository and
updates only those four repositories now. This package should be
removed and replaced by them.