$ git clone -n https://src.fedoraproject.org/rpms/vpnc-script.git /var/lib/mock/f45-build-38162-722/root/chroot_tmpdir/scmroot/vpnc-script
Cloning into '/var/lib/mock/f45-build-38162-722/root/chroot_tmpdir/scmroot/vpnc-script'...
$ git fetch origin c70c94a2a2ed3e766679c31fb69376801cc3e99c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/vpnc-script
 * [new ref]         c70c94a2a2ed3e766679c31fb69376801cc3e99c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c70c94a Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild