Jenkins not able to fetch code from remote git

git jenkins

I was seeing the same issue, but disk space and VM memory were not the problem. What fixed it for me was making the job re-clone on build:

Go to the job's "Configure" page
Under Source Code Management → Git → Additional Behaviors, add a behavior "Wipe out repository & force clone"
Save
Build

git jenkins

Experienced it when Jenkins VM was running out of disk space. Cleaned it up, don't see this problem anymore.

git jenkins

Try clearing out the workspace files and rebuilding.

CodeHunter