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    Type:Build Failure 
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    Resolution: Done
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    Priority:Unknown 
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    Affects Version/s: None
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    Component/s: Build
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E.g. build failure log for the comment action:
+ git clone https://github.com/mongodb/mongo-go-driver Cloning into 'mongo-go-driver'... + cd mongo-go-driver + git remote add source https://github.com/qingyang-hu/mongo-go-driver + git fetch origin master From https://github.com/mongodb/mongo-go-driver * branch master -> FETCH_HEAD + git fetch source cev/bson-allocs fatal: couldn't find remote ref cev/bson-allocs Error: Process completed with exit code 128.
See the full action here.
Seems to be caused by the $GITHUB_ACTOR not being equal to the PR author, so the remote doesn't have the expected branch. See here.