| Value | Meaning |
|---|---|
| GIT_MERGE_PREFERENCE_NONE0 | No configuration was found that suggests a preferred behavior for merge. |
| GIT_MERGE_PREFERENCE_NO_FASTFORWARD1 << 0 | There is a merge.ff=false configuration setting, suggesting that the user does not want to allow a fast-forward merge. |
| GIT_MERGE_PREFERENCE_FASTFORWARD_ONLY1 << 1 | There is a merge.ff=only configuration setting, suggesting that the user only wants fast-forward merges. |
The user's stated preference for merges.