$ git clone -n https://src.fedoraproject.org/rpms/links.git /var/lib/mock/f45-build-17403-498/root/chroot_tmpdir/scmroot/links
Cloning into '/var/lib/mock/f45-build-17403-498/root/chroot_tmpdir/scmroot/links'...
$ git fetch origin cbee8114ef7fd9f4d5dd7ba33a623f17b164ba0e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/links
 * [new ref]         cbee8114ef7fd9f4d5dd7ba33a623f17b164ba0e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at cbee811 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild