Investigate unnecessary writes

When viewing the logs of a `git clone` operation, there appears to be unnecessary writes occurring:
```
[2023-01-07T17:48:25Z DEBUG fuser::request] FUSE(5330) ino 0x0000000000000162 WRITE fh FileHandle(55), offse
t 200703, size 1, write flags 0x0
[2023-01-07T17:48:25Z DEBUG fuser::request] FUSE(5332) ino 0x0000000000000162 WRITE fh FileHandle(55), offse
t 200704, size 4095, write flags 0x0
[repeat]
```
Why are writes of size 1 occurring? Is this standard practice? Or, this could be an upstream issue.

Reproduce a git clone while collecting the fuser::request WRITE logs shown in the issue, then trace the 1-byte writes through Nimbus and compare the behavior with the upstream filesystem path. Done means identifying whether Nimbus causes the writes or whether they originate upstream, and documenting the evidence.

Written by the indexing model from the issue text.