bootstrap oddity

$ ./bootstrap

./bootstrap: Bootstrapping from checked-out hello sources...

./bootstrap: consider installing git-merge-changelog from gnulib

./bootstrap: getting gnulib files...

Submodule 'gnulib' () registered for path 'gnulib'

./bootstrap: getting translations into po/.reference for hello...

receiving incremental file list

sent 34 bytes  received 652 bytes  1372.00 bytes/sec

total size is 295770  speedup is 431.15

./bootstrap: updated po//home/rrt/repo/hello/po/.reference.po...

cp: cannot stat `po/.reference//home/rrt/repo/hello/po/.reference.po': No such file or directory