$ git clone -n https://src.fedoraproject.org/rpms/zam-plugins.git /var/lib/mock/f40-build-2216850-52519/root/chroot_tmpdir/scmroot/zam-plugins
Cloning into '/var/lib/mock/f40-build-2216850-52519/root/chroot_tmpdir/scmroot/zam-plugins'...
$ git fetch origin bc217af0bd168673f3282e60e55168ff78722946:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/zam-plugins
 * [new ref]         bc217af0bd168673f3282e60e55168ff78722946 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at bc217af Version 4.2