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http://jira.codehaus.org/browse/SCM-502?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=194002#action_194002
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Mark Struberg commented on SCM-502:
-----------------------------------
fixed in Revision 823147
> checking out a tag from a remote repository fails if the tag was not on the
> current branch
> ------------------------------------------------------------------------------------------
>
> Key: SCM-502
> URL: http://jira.codehaus.org/browse/SCM-502
> Project: Maven SCM
> Issue Type: Bug
> Components: maven-scm-provider-git
> Affects Versions: 1.2
> Reporter: Mark Struberg
> Assignee: Mark Struberg
> Fix For: 1.3
>
>
> Calling scm:checkout for a tag often results in a merge failure.
> This is caused by the fact that we do a git-pull prior to the checkout, but
> in fact for tags, we only shall do a git-fetch.
> This is due to the fact that the tag may be on a different branch, so merging
> this branch into the current branch in the local repository would destroy the
> local repository.
> Instead we should first do a git-fetch [fetchUrl] followed by a git-checkout
> tagname.
> This will create a 'detached HEAD' in the local repo which is exactly the way
> it should be in git.
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