зарегистрируйте содержимое файла в рабочем дереве в индекс (Register file contents in the working tree to the index)
Конфигурация (Configuration)
The command honors core.filemode configuration variable. If your
repository is on a filesystem whose executable bits are
unreliable, this should be set to false (see git-config(1)). This
causes the command to ignore differences in file modes recorded
in the index and the file mode on the filesystem if they differ
only on executable bit. On such an unfortunate filesystem, you
may need to use git update-index --chmod=.
Quite similarly, if core.symlinks configuration variable is set
to false (see git-config(1)), symbolic links are checked out as
plain files, and this command does not modify a recorded file
mode from symbolic link to regular file.
The command looks at core.ignorestat configuration variable. See
Using "assume unchanged" bit section above.
The command also looks at core.trustctime configuration variable.
It can be useful when the inode change time is regularly modified
by something outside Git (file system crawlers and backup systems
use ctime for marking files processed) (see git-config(1)).
The untracked cache extension can be enabled by the
core.untrackedCache configuration variable (see git-config(1)).
