About management of the default branch name
When a member of your organization creates a new repository in your organization, the repository contains one branch, which is the default branch. You can change the name that GitHub Enterprise Server uses for the default branch in new repositories that members of your organization create. For more information about the default branch, see "About branches."
您可以更改现有仓库的默认分支。 有关详细信息，请参阅“更改默认分支”。
If an enterprise owner has enforced a policy for the default branch name for your enterprise, you cannot set a default branch name for your organization. Instead, you can change the default branch for individual repositories. For more information, see "Enforcing repository management policies in your enterprise" and "Changing the default branch."
Setting the default branch name
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在 GitHub Enterprise Server 的右上角，单击� 的个人资料照片，然后单击“� 的组织”。
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在组织旁边，单击“设置”。
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In the left sidebar, click Repository defaults.
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Under "Repository default branch", click Change default branch name now.
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Type the default name that you would like to use for new branches.
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Click Update.
