Track index instead of head for diffs

crates/project/src/fs.rs

@@ -1,7 +1,7 @@
 use anyhow::{anyhow, Result};
 use fsevent::EventStream;
 use futures::{future::BoxFuture, Stream, StreamExt};
-use git::repository::{FakeGitRepository, GitRepository, RealGitRepository};
+use git::repository::{GitRepository, RealGitRepository};
 use language::LineEnding;
 use smol::io::{AsyncReadExt, AsyncWriteExt};
 use std::{
@@ -854,7 +854,10 @@ impl Fs for FakeFs {
     }
 
     fn open_repo(&self, abs_dot_git: &Path) -> Option<Box<dyn GitRepository>> {
-        Some(FakeGitRepository::open(abs_dot_git.into(), 0))
+        Some(git::repository::FakeGitRepository::open(
+            abs_dot_git.into(),
+            0,
+        ))
     }
 
     fn is_fake(&self) -> bool {

crates/project/src/worktree.rs

@@ -2603,7 +2603,13 @@ impl BackgroundScanner {
             .git_repositories
             .iter()
             .map(|repo| repo.boxed_clone())
-            .filter(|repo| git::libgit::Repository::open(repo.git_dir_path()).is_ok())
+            .filter_map(|mut repo| {
+                if repo.reopen_git_repo() {
+                    Some(repo)
+                } else {
+                    None
+                }
+            })
             .collect();
 
         snapshot.git_repositories = new_repos;