$ git clone -n https://src.fedoraproject.org/rpms/libva-nvidia-driver.git /var/lib/mock/f38-build-side-42-init-devel-1141532-30436/root/chroot_tmpdir/scmroot/libva-nvidia-driver
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-1141532-30436/root/chroot_tmpdir/scmroot/libva-nvidia-driver'...
$ git fetch origin 810fe0ee88e045e8a645bee3b8aac0aef1b869f2:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libva-nvidia-driver
 * [new ref]         810fe0ee88e045e8a645bee3b8aac0aef1b869f2 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 810fe0e Convert to rpmautospec