Potential bug: top_commit_of_remote_branch

[sale3]

It looks like top_commit_of_remote_branch doesn't work properly for one specific repo state.

This is the state where I found the issue:
local:
commit 90372b08456673748b303147965f36bb01427126 (HEAD -> master, origin/master)
origin:
commit 9faf537d797381aaab997c6e75ab6f5ded506320 (HEAD -> master)
commit 90372b08456673748b303147965f36bb01427126

and the outputs of two commands that fetch top/last remote commit:
repo.get_last_remote_commit(repo.get_remote_url()) -> 9faf537d797381aaab997c6e75ab6f5ded506320
repo.top_commit_of_remote_branch(repo.default_branch) -> 90372b08456673748b303147965f36bb01427126

These are the steps to recreate the issue:

• Create two commits on local repo and push them to origin
• Reset local repo back to the first commit (reset_to_commit)
• Try to get top commit with top_commit_of_remote_branch and with get_last_remote_commit and notice the difference.

Do we even need both of these functions if they are supposed to do the same thing?