I've read Git merges removing files but it didn't help understanding. I believe there was (and is) only one master branch.
% git diff 7348fe7 11b0744
diff --git "a/site.com.gpg" "b/site.com.gpg"
deleted file mode 100644
index 03fc298..0000000
--- "a/site.com.gpg"
+++ /dev/null
% git log --all --graph --decorate --oneline
...
* 11b0744 Merge branch 'master' of ssh://host/~/.password-store
|\
| * 7348fe7 Edit password for site.com using editor.
| * e21adcd Add generated password for site.com.
...
% git show 11b0744
commit 11b0744d63182148c5daa9d719159f0006bd2140
Merge: ff88689 7348fe7
Author: a <a@host>
Date: Sat Jun 27 11:36:28 2020 +0300
Merge branch 'master' of ssh://host/~/.password-store
diff --cc "site.com.gpg"
index 682f8f3,03fc298..0000000
deleted file mode 100644,100644
--- "a/site.com.gpg"
+++ /dev/null