I recently upgraded my Git Client plugin to 2.0.0 from 1.19.7. Immediately after jobs began failing due to an authentication issue. I rolled the plugin back to 1.19.7 and the jobs started passing. This is with TFS GIT.

Cloning the remote Git repository
Cloning repository https://REMOVED/_git/AppointmentsTribeTestAutomation
> C:\Program Files\Git\bin\git.exe init c:\Jenkins\workspace\Appointments_Test_ChromeNFW # timeout=10
Fetching upstream changes from https://REMOVED/_git/AppointmentsTribeTestAutomation
> C:\Program Files\Git\bin\git.exe --version # timeout=10
using GIT_ASKPASS to set credentials Credentials used for Version Control connections.
> C:\Program Files\Git\bin\git.exe fetch --tags --progress https:/REMOVED/_git/AppointmentsTribeTestAutomation +refs/heads/:refs/remotes/origin/
ERROR: Error cloning remote repo 'origin'
hudson.plugins.git.GitException: Command "C:\Program Files\Git\bin\git.exe fetch --tags --progress https://REMOVED/_git/AppointmentsTribeTestAutomation +refs/heads/:refs/remotes/origin/" returned status code 128:
stdout:
stderr: fatal: Authentication failed for 'https://REMOVED/_git/AppointmentsTribeTestAutomation/'

at org.jenkinsci.plugins.gitclient.CliGitAPIImpl.launchCommandIn(CliGitAPIImpl.java:1752)
at org.jenkinsci.plugins.gitclient.CliGitAPIImpl.launchCommandWithCredentials(CliGitAPIImpl.java:1495)
at org.jenkinsci.plugins.gitclient.CliGitAPIImpl.access$300(CliGitAPIImpl.java:64)
at org.jenkinsci.plugins.gitclient.CliGitAPIImpl$1.execute(CliGitAPIImpl.java:315)
at org.jenkinsci.plugins.gitclient.CliGitAPIImpl$2.execute(CliGitAPIImpl.java:507)
at org.jenkinsci.plugins.gitclient.RemoteGitImpl$CommandInvocationHandler$1.call(RemoteGitImpl.java:152)
at org.jenkinsci.plugins.gitclient.RemoteGitImpl$CommandInvocationHandler$1.call(RemoteGitImpl.java:145)
at hudson.remoting.UserRequest.perform(UserRequest.java:120)
at hudson.remoting.UserRequest.perform(UserRequest.java:48)
at hudson.remoting.Request$2.run(Request.java:332)
at hudson.remoting.InterceptingExecutorService$1.call(InterceptingExecutorService.java:68)
at java.util.concurrent.FutureTask.run(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at hudson.remoting.Engine$1$1.run(Engine.java:85)
at java.lang.Thread.run(Unknown Source)
at ......remote call to REMOVED(Native Method)
at hudson.remoting.Channel.attachCallSiteStackTrace(Channel.java:1416)
at hudson.remoting.UserResponse.retrieve(UserRequest.java:253)
at hudson.remoting.Channel.call(Channel.java:781)
at org.jenkinsci.plugins.gitclient.RemoteGitImpl$CommandInvocationHandler.execute(RemoteGitImpl.java:145)
at sun.reflect.GeneratedMethodAccessor692.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at org.jenkinsci.plugins.gitclient.RemoteGitImpl$CommandInvocationHandler.invoke(RemoteGitImpl.java:131)
at com.sun.proxy.$Proxy75.execute(Unknown Source)
at hudson.plugins.git.GitSCM.retrieveChanges(GitSCM.java:1042)
at hudson.plugins.git.GitSCM.checkout(GitSCM.java:1082)
at hudson.scm.SCM.checkout(SCM.java:495)
at hudson.model.AbstractProject.checkout(AbstractProject.java:1269)
at hudson.model.AbstractBuild$AbstractBuildExecution.defaultCheckout(AbstractBuild.java:604)
at jenkins.scm.SCMCheckoutStrategy.checkout(SCMCheckoutStrategy.java:86)
at hudson.model.AbstractBuild$AbstractBuildExecution.run(AbstractBuild.java:529)
at hudson.model.Run.execute(Run.java:1741)
at hudson.model.FreeStyleBuild.run(FreeStyleBuild.java:43)
at hudson.model.ResourceController.execute(ResourceController.java:98)
at hudson.model.Executor.run(Executor.java:410)
ERROR: null