Unhandled error cause infinite loop in @changesets/git #602

Affected Packages

• @changesets/git

Problem

In some git solutions like Bitbucket, git fetch --deepen [Number] does not work.

When the command changeset version is runned in a step from bitbucket-pipeline, that is using a shallow clone, the step locks.

This happens because the changeset version try to get more commits from history using the git fetch --deepen command

Proposed solution

Throw an error if the returning code from git fetch --deepen [Number] is different from 0.

https://github.com/atlassian/changesets/blob/main/packages/git/src/index.ts#L165