How can I recover my Git repository for a “missing tree” error?

Question

We are using Gerrit for our Git repository. On a project that has been active for several months, we are suddenly unable to push any changes. When we execute git pus

Answer 1

Try a git pull --rebase.

I saved the diff (git show > ~/mychanges.txt, took out the commit msg at the top of the file). The checked out a new branch (git checkout -b newbranch) applied the changes (git apply ~/mychanges.txt), and then did a git pull --rebase. Then everything worked.