Renaming "TYPO3v4" repositories to "TYPO3CMS"
Some remaining "TYPO3v4" repositories were to be renamed to "TYPO3CMS" on git.typo3.org following the new branding that happened some time ago already.
The situation has been settled and naming should be conformed and unified at last! Along to the Git repositories, Gerrit Groups and Forge URL were also updated. As information, for one repository there are two Gerrit Groups, one for Members and the other for Leaders who have more permissions. This basically reflects the User responsibilities on Forge.
Assuming your extension still had the "TYPO3v4" segment, you will need to rename the
git remote set-url origin git://git.typo3.org/TYPO3CMS/Extensions/foo.git
Your server team.