$ git clone -n https://src.fedoraproject.org/rpms/fedora-active-user.git /var/lib/mock/f45-build-8805-396/root/chroot_tmpdir/scmroot/fedora-active-user
Cloning into '/var/lib/mock/f45-build-8805-396/root/chroot_tmpdir/scmroot/fedora-active-user'...
$ git fetch origin 0233f94b492ec3852a564a82e302249802077c7d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/fedora-active-user
 * [new ref]         0233f94b492ec3852a564a82e302249802077c7d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0233f94 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild