$ git clone -n https://src.fedoraproject.org/rpms/nautilus.git /var/lib/mock/f41-build-856674-167740/root/chroot_tmpdir/scmroot/nautilus
Cloning into '/var/lib/mock/f41-build-856674-167740/root/chroot_tmpdir/scmroot/nautilus'...
$ git fetch origin 7d373c6540cdcbdd00c9e891467484fb1b98ff04:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/nautilus
 * [new ref]         7d373c6540cdcbdd00c9e891467484fb1b98ff04 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7d373c6 Update to 47.0