$ git clone -n https://src.fedoraproject.org/rpms/openbox-theme-mistral-thin-dark.git /var/lib/mock/f45-build-21002-577/root/chroot_tmpdir/scmroot/openbox-theme-mistral-thin-dark
Cloning into '/var/lib/mock/f45-build-21002-577/root/chroot_tmpdir/scmroot/openbox-theme-mistral-thin-dark'...
$ git fetch origin 4b4a6efe7bb0047e2d332605f5f6ad3693d03e2c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/openbox-theme-mistral-thin-dark
 * [new ref]         4b4a6efe7bb0047e2d332605f5f6ad3693d03e2c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4b4a6ef Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild