I have read the hints about using a local wiki to preview changes, but I haven't understood: is it assumed that I should also have a separate "srcdir" for this local preview-wiki (as it is done for the main wiki site), or I could point the local ikiwiki's "srcdir" to the working dir? Can something bad happen if I do this? I guess no, because--as I see it--the reason to have 2 repos for the main site was only enabling pushing to it, so it's a peculiarity of git, and not a requirement for a clean functioning of ikiwiki.
Ok, probably, I have answered my question myself, but I'll let this comment stay here, if someone else will be tinking about the same issue. --Ivan Z.
+
+## Fix for error on git pull origin
+
+Error message when running git pull origin:
+
+ You asked me to pull without telling me which branch you
+ want to merge with, and 'branch.master.merge' in
+ your configuration file does not tell me either. Please
+ name which branch you want to merge on the command line and
+ try again (e.g. 'git pull <repository> <refspec>').
+ See git-pull(1) for details on the refspec.
+
+ If you often merge with the same branch, you may want to
+ configure the following variables in your configuration
+ file:
+
+ branch.master.remote = <nickname>
+ branch.master.merge = <remote-ref>
+ remote.<nickname>.url = <url>
+ remote.<nickname>.fetch = <refspec>
+
+ See git-config(1) for details.
+
+The solution is to run this command in your srcdir:
+
+ git config branch.master.remote origin