Pulling in a single commit would be a cherry-pick and would rewrite the commit ID (and mark you as the committer while retaining the author). The process is pretty straightforward, though:
git fetch git://github.com/user/project.git
git cherry-pick <SHA-COMMIT-ID>
You get the SHA from the repository log, for example:
git log --oneline
b019cc0 Check whether we have <linux/compiler.h>.
0920898 Include <linux/compiler.h> before including <linux/usbdevice_fs.h>.
cbf0ba1 Add DLT_DBUS, for raw D-Bus messages.
77ed5cd Libnl 2.x returns its own error codes, not errnos; handle that.
With git cherry-pick 0920898 you bring the respective commit to your current branch.