merge(third_party/git): Merge squashed git subtree at v2.23.0 r/373

Merge commit '1b593e1ea4d2af0f6444d9a7788d5d99abd6fde5' as 'third_party/git'

1 files changed, 560 insertions, 0 deletions

diff --git a/third_party/git/t/t9111/svnsync.dump b/third_party/git/t/t9111/svnsync.dump
new file mode 100644
index 000000000000..499fa9594faf
--- /dev/null
+++ b/third_party/git/t/t9111/svnsync.dump
@@ -0,0 +1,560 @@
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