$ git clone -n https://src.fedoraproject.org/rpms/gkrellm-sun.git /var/lib/mock/f45-build-11125-427/root/chroot_tmpdir/scmroot/gkrellm-sun
Cloning into '/var/lib/mock/f45-build-11125-427/root/chroot_tmpdir/scmroot/gkrellm-sun'...
$ git fetch origin f0fbd879daf284029b36fcdc945ea417abde7dc1:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gkrellm-sun
 * [new ref]         f0fbd879daf284029b36fcdc945ea417abde7dc1 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f0fbd87 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild