$ git clone -n https://src.fedoraproject.org/rpms/rpki-client.git /var/lib/mock/f39-build-1490124-34503/root/chroot_tmpdir/scmroot/rpki-client
Cloning into '/var/lib/mock/f39-build-1490124-34503/root/chroot_tmpdir/scmroot/rpki-client'...
$ git fetch origin 806b36144656f80ad63ce25430ffd27f3a486ff4:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rpki-client
 * [new ref]         806b36144656f80ad63ce25430ffd27f3a486ff4 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 806b361 Upgrade to 8.6 (#2242194)