Nimble commands fail after `git init`

[narimiran]

I've tried to run nimble lock on a directory which wasn't under version control, and I got this message:

    Error:  Sync file require current working directory to be under some supported type of version control.
     Hint:  Put package's working directory under version control.

(and this still created nimble.lock file, btw)

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After that, I've run git init, and now nimble lock produces:

$ nimble lock
       Tip: 2 messages have been suppressed, use --verbose to show them.
tools.nim(62)            tryDoCmdEx

    Error:  Execution of 'git -C /home/miran/code/nim-lang/tests/myPackage rev-parse HEAD' failed with an exit code 128.
        ... Details: fatal: ambiguous argument 'HEAD': unknown revision or path not in the working tree.
        ... Use '--' to separate paths from revisions, like this:
        ... 'git <command> [<revision>...] -- [<file>...]'
        ... HEAD

The same error appears on some other commands (e.g. nimble check, nimble test, or non-existing commands such as nimble foobar), but not on others (e.g. nimble tasks or nimble list -i).

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The issue is resolved after one makes a first commit. But then the original hint ("Put package's working directory under version control.") should be changed to reflect that just initializing git isn't enough.