Squash and lost history

scripts.sh

╰─>$ git checkout -b feature-branch
Switched to a new branch 'feature-branch'

╰─>$ git commit -a -m 'Commit 2'
[feature-branch 1f16b96] Commit 2
 1 file changed, 1 insertion(+)

╰─>$ git commit -a -m 'Commit 3'
[feature-branch f7c9f08] Commit 3
 1 file changed, 1 insertion(+)

╰─>$ git merge --squash feature-branch
Updating 1efbcd8..f7c9f08
Fast-forward
Squash commit -- not updating HEAD
 some-file.txt | 2 ++
 1 file changed, 2 insertions(+)

╰─>$ git commit -v
[master b4f8101] Squashed commit of the following:
 1 file changed, 2 insertions(+)

╰─>$ git branch -d feature-branch 
error: The branch 'feature-branch' is not fully merged.
If you are sure you want to delete it, run 'git branch -D feature-branch'.

╰─>$ git branch -D feature-branch 
Deleted branch feature-branch (was f7c9f08).

# No info about the feature-branch:
╰─>$ git log --oneline --graph
* b4f8101 (HEAD -> master) Squashed commit of the following:
* 1efbcd8 Commit 1

# Dangling commit:
╰─>$ git fsck --lost-found
Checking object directories: 100% (256/256), done.
Checking objects: 100% (10/10), done.
dangling commit f7c9f0860e0de7ba0e1299d8c71a8f67c3dfdf52