style-additions.css

td.repo {
  word-wrap: break-word;
  word-break: break-all;
}

.sticky-header>thead>tr>* {
  position: sticky;
  position: -webkit-sticky;
  position: -moz-sticky;
  position: -ms-sticky;
  position: -o-sticky;
  top: 0px;
  background-color: #fff;
  z-index: 1;
  border: none;
}
.sticky-header>tbody>tr:first-child>* {
  border: none;
}
.sticky-header>thead>tr>*::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  border-bottom: 2px solid #ddd;
}