Example of how a commit might go "missing" when renamed on Git

missing_git_commit.sh

git checkout -b branch1
touch test.txt
git add .
git commit -m "Commit 1"
for i in `seq 1 10`; do echo $i >> test.txt; done
git add .
git commit -m "Commit 2"
git checkout -b branch2
mv test.txt renamed.txt
git add .
git commit -m "Commit 3"
git checkout branch1
rm test.txt
touch test.txt
for i in `seq 1 4`; do echo $i >> test.txt; done
for i in `seq 8 10`; do echo $i >> test.txt; done
git add .
git commit -m "Commit 4 (missing)"
git checkout branch1
git merge branch2 --no-edit
for i in `seq 5 7`; do echo $i >> renamed.txt; done
git add .
git commit -m "Commit 5"

#missing commit
git log --follow -- renamed.txt
# vs all commits
git log --follow --topo-order -- renamed.txt