运行 git status 时，消息“您的分支是最新的，带有'origin/branch'”仅出现几次

问：

我有一个包含多个分支的存储库。所有分支都与等效的远程分支保持同步。

例如，请参阅以下两个分支的 git status 和 git log 的输出：

分行mantis_0074

mchaleg@ELT-L-0018 ~/Documents/BitBucket/electroroute_repositories/gudrun (mantis_0074)
$ git status
On branch mantis_0074
nothing to commit, working directory clean

mchaleg@ELT-L-0018 ~/Documents/BitBucket/electroroute_repositories/gudrun (mantis_0074)
$ git log --oneline --decorate
a67b6f7 (HEAD, origin/mantis_0074, mantis_0074) M-0074: Update expected results from sample bids.
afda69c M-0074: Rename long and short term intra-day BritNed auction files to use the correct name format so that they will be processed correctly (i.e. not handled as
bcc41 M-0074: Add unprocessed files which can be used for testing amp_file_transfer.ps1 script.

分行mantis_0151

mchaleg@ELT-L-0018 ~/Documents/BitBucket/electroroute_repositories/gudrun (mantis_0151)
$ git status
On branch mantis_0151
Your branch is up-to-date with 'origin/mantis_0151'.

nothing to commit, working directory clean

mchaleg@ELT-L-0018 ~/Documents/BitBucket/electroroute_repositories/gudrun (mantis_0151)
$ git log --oneline --decorate
f0487e2 (HEAD, origin/mantis_0151, mantis_0151) mantis_0151 Finalised version of trigger with updated varaible names etc
24a0ae0 mantis_0151 get the tb_apx_fact_private_trades table trigger into line with what is in production as it currently isn't. Also add the create statement as well

从 git log 输出中可以看出，这两个分支都与远程分支保持同步。

既然两个分支都是最新的，为什么消息只显示在分支mantis_0151的 git 状态消息中？Your branch is up-to-date with 'origin/branch'