bug#55649: Feature request: filter channel on "guix pull"

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bug#55649: Feature request: filter channel on "guix pull"

I'd like to be able to select a specific channel to be updated when running a "guix pull" command. Let's say I have a "channels.scm" file, containing 3 channels: "abc", "xyz" and "guix", all pointing to the branch "main". When running "guix pull", all three channels get updated via a "git pull",