Add git_hash to dump_file function in addition to version

Author: JulianFP

src/setuptools_scm/_integration/dump_version.py

@@ -16,7 +16,7 @@
 # file generated by setuptools-scm
 # don't change, don't track in version control
 
-__all__ = ["__version__", "__version_tuple__", "version", "version_tuple"]
+__all__ = ["__version__", "__version_tuple__", "version", "version_tuple", "__git_hash__", "git_hash"]
 
 TYPE_CHECKING = False
 if TYPE_CHECKING:
@@ -31,9 +31,13 @@
 __version__: str
 __version_tuple__: VERSION_TUPLE
 version_tuple: VERSION_TUPLE
+git_hash: str
+__git_hash__: str
 
 __version__ = version = {version!r}
 __version_tuple__ = version_tuple = {version_tuple!r}
+
+__git_hash__ = git_hash = {scm_version.node!r}
 """,
     ".txt": "{version}",
 }