$ git clone -n https://src.fedoraproject.org/rpms/gkrellm-top.git /var/lib/mock/f45-build-11137-427/root/chroot_tmpdir/scmroot/gkrellm-top
Cloning into '/var/lib/mock/f45-build-11137-427/root/chroot_tmpdir/scmroot/gkrellm-top'...
$ git fetch origin ae9224191853d6c68ed4684a55505c42a2b2358f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gkrellm-top
 * [new ref]         ae9224191853d6c68ed4684a55505c42a2b2358f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ae92241 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild