$ git clone -n https://src.fedoraproject.org/rpms/elementary-xfce-icon-theme.git /var/lib/mock/f45-build-8015-372/root/chroot_tmpdir/scmroot/elementary-xfce-icon-theme
Cloning into '/var/lib/mock/f45-build-8015-372/root/chroot_tmpdir/scmroot/elementary-xfce-icon-theme'...
$ git fetch origin 719b6b9452ef08a3ecbb94a5f6f8db4b735f3e4d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/elementary-xfce-icon-theme
 * [new ref]         719b6b9452ef08a3ecbb94a5f6f8db4b735f3e4d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 719b6b9 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild