Revert "git: List branches verbosely"

This reverts commit 9187d4d13bb35bf833b43952970bac9b01a984aa.
git: Do not fetch before "out" as it takes time and usually is not required
git: Change "push.default" from "upstream" to "simple"

"upstream" had bitten me, pushing to the wrong branch when I intended to
push under the local branch name. This is a good preparation to get used
to the default setting for Git 2.0 :-)
git: Also detect copies in addition to renames by default