diff --git a/docs/source/io_formats/statepoint.rst b/docs/source/io_formats/statepoint.rst
index e334f2bf11..a93e2f26d1 100644
--- a/docs/source/io_formats/statepoint.rst
+++ b/docs/source/io_formats/statepoint.rst
@@ -27,6 +27,10 @@ The current revision of the statepoint file format is 15.
 
     Release version number for OpenMC
 
+**/git_sha1** (*char[40]*)
+
+    Git commit SHA-1 hash
+
 **/date_and_time** (*char[]*)
 
     Date and time the state point was written.
diff --git a/docs/source/io_formats/summary.rst b/docs/source/io_formats/summary.rst
index 435cb45c87..3084c27383 100644
--- a/docs/source/io_formats/summary.rst
+++ b/docs/source/io_formats/summary.rst
@@ -27,6 +27,10 @@ The current revision of the summary file format is 4.
 
     Release version number for OpenMC
 
+**/git_sha1** (*char[40]*)
+
+    Git commit SHA-1 hash
+
 **/date_and_time** (*char[]*)
 
     Date and time the summary was written.
diff --git a/src/output.F90 b/src/output.F90
index c719dbed97..b1b8320c68 100644
--- a/src/output.F90
+++ b/src/output.F90
@@ -173,10 +173,13 @@ contains
     if (master) then
       write(UNIT=OUTPUT_UNIT, FMT='(1X,A,1X,I1,".",I1,".",I1)') &
            "OpenMC version", VERSION_MAJOR, VERSION_MINOR, VERSION_RELEASE
+#ifdef GIT_SHA1
+      write(UNIT=OUTPUT_UNIT, FMT='(1X,A,A)') "Git SHA1: ", GIT_SHA1
+#endif
       write(UNIT=OUTPUT_UNIT, FMT=*) "Copyright (c) 2011-2015 &
            &Massachusetts Institute of Technology"
       write(UNIT=OUTPUT_UNIT, FMT=*) "MIT/X license at &
-           &<http://mit-crpg.github.io/openmc/license.html>"
+           &<http://openmc.readthedocs.io/en/latest/license.html>"
     end if
 
   end subroutine print_version
diff --git a/src/state_point.F90 b/src/state_point.F90
index 257753b5b4..5872fbadf4 100644
--- a/src/state_point.F90
+++ b/src/state_point.F90
@@ -77,6 +77,9 @@ contains
       call write_dataset(file_id, "version_major", VERSION_MAJOR)
       call write_dataset(file_id, "version_minor", VERSION_MINOR)
       call write_dataset(file_id, "version_release", VERSION_RELEASE)
+#ifdef GIT_SHA1
+      call write_dataset(file_id, "git_sha1", GIT_SHA1)
+#endif
 
       ! Write current date and time
       call write_dataset(file_id, "date_and_time", time_stamp())
diff --git a/src/summary.F90 b/src/summary.F90
index 78a8276f16..a17aa5210d 100644
--- a/src/summary.F90
+++ b/src/summary.F90
@@ -96,6 +96,9 @@ contains
     call write_dataset(file_id, "version_major", VERSION_MAJOR)
     call write_dataset(file_id, "version_minor", VERSION_MINOR)
     call write_dataset(file_id, "version_release", VERSION_RELEASE)
+#ifdef GIT_SHA1
+    call write_dataset(file_id, "git_sha1", GIT_SHA1)
+#endif
 
     ! Write current date and time
     call write_dataset(file_id, "date_and_time", time_stamp())