In the FreeBSD ports repository I resurrected the directory (that was removed a long time ago) with the command:
$ git checkout {hash}~1 -- math/polymake
I made local changes to this directory and called 'git add math/polymake'.
Then 'git pull' complained:
$ git pull
error: Your local changes to the following files would be overwritten by merge:
math/polymake/Makefile math/polymake/distinfo math/polymake/files/patch-Makefile math/polymake/files/patch-support_install.pl math/polymake/pkg-descr math/polymake/pkg-plist
No incoming changes affect math/polymake. Nobody has created this directory simultaneously with me. There is no intersection with incoming changes.
Why does 'git pull' complain then?
Yuri