$ git clone -n https://src.fedoraproject.org/rpms/perl-JSON-RPC-LWP.git /var/lib/mock/f45-build-24323-603/root/chroot_tmpdir/scmroot/perl-JSON-RPC-LWP
Cloning into '/var/lib/mock/f45-build-24323-603/root/chroot_tmpdir/scmroot/perl-JSON-RPC-LWP'...
$ git fetch origin f489180e6a82cb8c1fb8b42ef747153935ee944e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-JSON-RPC-LWP
 * [new ref]         f489180e6a82cb8c1fb8b42ef747153935ee944e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f489180 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild