'recording branch B tree' \
'tree_B=$(git-write-tree)'
+test_expect_success \
+ 'keep contents of 3 trees for easy access' \
+ 'rm -f .git/index &&
+ git-read-tree $tree_O &&
+ mkdir .orig-O &&
+ git-checkout-cache --prefix=.orig-O/ -f -q -a &&
+ rm -f .git/index &&
+ git-read-tree $tree_A &&
+ mkdir .orig-A &&
+ git-checkout-cache --prefix=.orig-A/ -f -q -a &&
+ rm -f .git/index &&
+ git-read-tree $tree_B &&
+ mkdir .orig-B &&
+ git-checkout-cache --prefix=.orig-B/ -f -q -a'