git describe in an override-build is always claiming to be dirty

[lengau]

Bug Description

This is upstreamed from canonical/snapcraft#5831

If you have a spread/.extension file, git describe --dirty in an override-build will always show the repo as dirty because spread.yaml and spread/.extension don't get copied into the build directory.

This is causing Charmcraft 4.0.0 to appear to be dirty.

To Reproduce

Check out the 4.0.0 tag of Charmcraft and pack it

Environment

My machine, launchpad, etc...

snapcraft.yaml

...

Relevant log output

n/a

Additional context

No response

[syncronize-issues-to-jira]

Thank you for reporting your feedback to us!

The internal ticket has been created: https://warthogs.atlassian.net/browse/CRAFT-4883.

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[lengau]

I'm pretty sure this was introduced in #766