$ git clone -n https://src.fedoraproject.org/rpms/libcpuid.git /var/lib/mock/f39-build-1470230-33886/root/chroot_tmpdir/scmroot/libcpuid
Cloning into '/var/lib/mock/f39-build-1470230-33886/root/chroot_tmpdir/scmroot/libcpuid'...
$ git fetch origin 720c0f382985441aba2728a90a57bacc3f5aa5ec:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libcpuid
 * [new ref]         720c0f382985441aba2728a90a57bacc3f5aa5ec -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 720c0f3 Update to 0.6.4