$ git clone -n https://src.fedoraproject.org/rpms/unbound.git /var/lib/mock/f39-build-1460043-33177/root/chroot_tmpdir/scmroot/unbound
Cloning into '/var/lib/mock/f39-build-1460043-33177/root/chroot_tmpdir/scmroot/unbound'...
$ git fetch origin 218f551c2490d49fc5ce06cb04c0ac6b814e5cef:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/unbound
 * [new ref]         218f551c2490d49fc5ce06cb04c0ac6b814e5cef -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 218f551 Fix for resolving outlook.com via forwarders