feat: support to output the timestamp

[LinuxSuRen]

No description provided.

[codecov]

Codecov Report

Attention: Patch coverage is 25.00000% with 6 lines in your changes are missing coverage. Please review.

Project coverage is 38.55%. Comparing base (b7dacce) to head (bb5dfee).

Files	Patch %	Lines
cmd/checkout.go	25.00%	6 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master      #52      +/-   ##
==========================================
- Coverage   38.80%   38.55%   -0.26%     
==========================================
  Files           8        8              
  Lines         420      428       +8     
==========================================
+ Hits          163      165       +2     
- Misses        255      261       +6     
  Partials        2        2              

Flag	Coverage Δ
unittests	38.55% <25.00%> (-0.26%)	⬇️

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