crawlers and some backup systems).
See linkgit:git-update-index[1]. True by default.
+core.untrackedCache::
+ Determines what to do about the untracked cache feature of the
+ index. It will be kept, if this variable is unset or set to
+ `keep`. It will automatically be added if set to `true`. And
+ it will automatically be removed, if set to `false`. Before
+ setting it to `true`, you should check that mtime is working
+ properly on your system.
+ See linkgit:git-update-index[1]. `keep` by default.
+
core.checkStat::
Determines which stat fields to match between the index
and work tree. The user can set this to 'default' or