I'm trying to find out where is described the first line of git log
output:
commit 3739bae879edbfd55f8e0c42a5b5c29fe2d6f772 (HEAD -> master)
commit 53a9a3759d67c92ffde67523aecd8d7eba10c39b (HEAD, origin/master, origin/HEAD, master)
commit 53a9a3759d67c92ffde67523aecd8d7eba10c39b (HEAD -> master, origin/master, origin/HEAD)
commit bbd140f23a4a9c42ff80a7776b725a3064d6c43e (HEAD, upstream/master, upstream/HEAD)
In particular, I'd like to understand the part in parentheses. While I believe I can guess the first 2 items, I don't know what 3^ and 4^ are and I can't understand where they're described.