$ git clone -n https://src.fedoraproject.org/rpms/google-guest-agent.git /var/lib/mock/f39-build-1543150-36537/root/chroot_tmpdir/scmroot/google-guest-agent
Cloning into '/var/lib/mock/f39-build-1543150-36537/root/chroot_tmpdir/scmroot/google-guest-agent'...
$ git fetch origin f340a4e4c64f536d7baf89564b213c7f26a4bbd6:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/google-guest-agent
 * [new ref]         f340a4e4c64f536d7baf89564b213c7f26a4bbd6 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f340a4e Fix typo on ppc64le