$ git clone -n https://src.fedoraproject.org/rpms/gnome-shell-extension-background-logo.git /var/lib/mock/f45-build-11484-432/root/chroot_tmpdir/scmroot/gnome-shell-extension-background-logo
Cloning into '/var/lib/mock/f45-build-11484-432/root/chroot_tmpdir/scmroot/gnome-shell-extension-background-logo'...
$ git fetch origin edfb6cb1b86dd32e1a255aa7d56251b1d6d8e82d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gnome-shell-extension-background-logo
 * [new ref]         edfb6cb1b86dd32e1a255aa7d56251b1d6d8e82d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at edfb6cb Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild