fix hardcoded origin name in checkAdjustedClone

init: Fix a crash when the repo's was cloned from a repo that had an
adjusted branch checked out, and the origin remote is not named "origin".

The only other hardcoding of the name of origin is in:

- Upgrade.V2, which can be ignored probably
- Annex.Branch, which doesn't fail if it has some other name, but just
  doesn't set up the git-annex branch with quite as linear a history in
  that case.

doc/bugs/crippledfs__58___annex-init_crash_when_remote_name_is.mdwn

@@ -51,3 +51,5 @@ overriding `annex.crippledfilesystem`.  Entering an adjusted branch in
 `a` is sufficient to trigger this.
 
 [[!tag projects/datalad]]
+
+> [[fixed|done]] --[[Joey]]