From: Artur Skawina <hidden> Date: 2016-06-15 22:49:29
Given commit C, refs (branches) R, S and T what would be the best way
to test whether 'C' is reachable from any of the heads?
Checking if `git rev-list -n1 O ^R ^S ^T` produces any output is what
i came up with; is there a better (ie faster) solution?
artur