convert: return remote branches in git source When converting git repos, all stuff happening on branches seems to be ignored. This is caused by the fact a "git clone" of a remote git repo has all its branches prefixed with "origin/". By chance, the "origin/master" branch is always linked to a local "master" branch. So getheads() returns only the master head, and it ignores all the other heads. Make sure getheads() returns all heads, forcing remote branches to be return by git-rev-parse.