git-utimes

Change all files modification time to their last commit date

$ git utimes

$ git utimes --newer

git utimes [-t ] [...]

-t
    Specifies the timestamp to use instead of the commit time. can be a date string understood by `git rev-parse --since`.

[...]
    A list of files to update. If no files are specified, all files in the repository are updated.

The `git-utimes` command updates the access and modification timestamps of files tracked by Git to match the commit time of their last modification. This is useful for ensuring that build systems or other tools that rely on file timestamps function correctly after checking out a Git repository. It essentially 'resets' the timestamps to the time of the last commit where the file was changed. This tool can be used to fix cases where build systems depend on file timestamps and the checkout process changes the timestamp to the current time instead of the commit time.

This utility helps prevent unnecessary rebuilds or other timestamp-related issues that can arise after working with Git repositories.

This command modifies file system timestamps and requires write access to the files in the repository.
Running `git utimes` may cause file managers or indexing services to re-index files, potentially impacting performance temporarily.

Update all files in the repository to their last commit time:
git utimes

Update only the 'src/main.c' file:
git utimes src/main.c

Update all files with timestamp from 2020:
git utimes -t 2020

The `git-utimes` command is often implemented as a custom script or alias rather than being a core Git command.
It addresses a common need to reconcile file timestamps with Git history for build automation and other tools that rely on modification times.

git rev-parse(1), git log(1)