小结
由于输入错误的TortoiseGit密码，导致后续的TortoiseGit自动登录都失败，对密码的缓存进行了清理，可以重新登录，并达到TortoiseGit远程自动登录。
问题及解决
参考Go to the Windows Credential Manager (press Windows and type "Credential Manager", or go to Control Panel\User Accounts and Family Safety\Credential Manager or use Start->Run rundll32.exe keymgr.dll,KRShowKeyMgr), there all saved credentials should be listed (prefixed with git:).
在Windows Credentials里找到想要清除的TortoiseGit用户名和密码，点Remove即可清除。