After upgrading git-plugin from 3.6.0 to 3.6.2, we ran into issues with branch indexing.

Our setup:

•  multibranch project is configured to use git plugin as a branch source

<source class="jenkins.plugins.git.GitSCMSource" plugin="git@3.6.2">

• we are using ssh for access

<remote>ssh://...</remote>

• we are using SSH key stored in credentials store

<credentialsId>git</credentialsId>

• private key in credentials store is entered directly - see attached screenshot

As I mentioned before, after downgrade back to previous installed version - 3.6.0 it works again as expected...

Build is running OK with either version.

During branch indexing we are getting following error:

hudson.plugins.git.GitException: Command "git ls-remote --symref ssh://..." returned status code 128:
stdout: 
stderr: Host key fingerprint is SHA256:mwgKiiDwV1aEzioD2snW9pEl6w...
+---[ECDSA 256]---+
...
+----[SHA256]-----+
Permission denied (publickey).
fatal: Could not read from remote repository.

Please make sure you have the correct access rights
and the repository exists.