Dear Git,

git merge-base --fork-point "master" not working if master is already newer 
then my current branch.
Very oddly it seems to work whenever you had the expected commit checked out 
previously - what made it very tricky to detect this problem.

Example:
 - Clone "https://github.com/jekelhart/GitInfoTry";
 - Switch to branch "v1.0.0"
 - git merge-base --fork-point "master"
   - or: git merge-base --fork-point "origin/master" 
 - expected result: fork point "fbb1db34c6317a6e8b319c1ec261e97ca1672c22"
 - but result is empty

In the repo where we created this example tree in the first place the command 
returned the expected fork point. If you clone it new and fresh it does not 
return any result anymore.

Works, however, on branch "v2.0.0". Assumption: because "master" is older.(?)
I think it works locally because the command uses the reflog in addition(!), 
however, it should work without the local reflog as well. (since the history 
was not modified in any way)

BR, Jakob

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