$ git clone -n https://src.fedoraproject.org/rpms/httptunnel.git /var/lib/mock/f45-build-13563-453/root/chroot_tmpdir/scmroot/httptunnel
Cloning into '/var/lib/mock/f45-build-13563-453/root/chroot_tmpdir/scmroot/httptunnel'...
$ git fetch origin 403d8157731be6b2188c7a60102431c1f74a7659:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/httptunnel
 * [new ref]         403d8157731be6b2188c7a60102431c1f74a7659 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 403d815 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild