Change the way to get fetch args in sparo fetch & cr fix

[EscapeB]

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Summary

1. Add remote and branch arguments in sparo fetch
2. CR fix for feat: sync changes #2

Detail

1. Add getBranchRemote function in gitService to get current branch remote.
2. Change the way to get fetch args
   • If user defined remote and branch, use users' input.
   • If not user not defined remote and branch, use getBranchRemote to get remote and use current branch.