To display changes between two commits you need to know SHA sum of commit.
You can take it from
# git log
Example command output:
commit 5b75d2ecf30b2ee9b28ca1febf60fb96b4d8625c Merge: 78ac4ff4 ccb47ced Author: Author Name <email@example.com> Date: Mon Feb 13 22:27:55 2017 +0000 Commit description goes here... commit 4b6197f19f8c196e246d6277059f1d784e635a67 Author: Author Name <firstname.lastname@example.org> Date: Mon Feb 13 20:34:38 2017 +0600 Another commit description goes here...
Then you can run command:
# git diff --name-only 4b6197f19f8c196e246d6277059f1d784e635a67 5b75d2ecf30b2ee9b28ca1febf60fb96b4d8625c
it will show you list of changed files.
Alternatively, you can also use command:
# git diff --name-only HEAD~7 HEAD~14
to see the difference between seventh and fourteenth latest commits.