Wishlist for branch management

A wishlist for better handling of branches:

git clone --branches

... git clone, with the additional step of setting up local branches for each one of the remote branches.

git branch --current

... list the current branch name, for use in scripts.  Equivalent to:
	"git branch | grep '^\*' | cut -c3-"

git push --current

... push the current branch, and only the current branch...

	-hpa