$ git clone -n https://src.fedoraproject.org/rpms/rubygem-ruby-dbus.git /var/lib/mock/f45-build-35232-694/root/chroot_tmpdir/scmroot/rubygem-ruby-dbus
Cloning into '/var/lib/mock/f45-build-35232-694/root/chroot_tmpdir/scmroot/rubygem-ruby-dbus'...
$ git fetch origin c32a659225a5823ec216e0530e48a739a542e22b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rubygem-ruby-dbus
 * [new ref]         c32a659225a5823ec216e0530e48a739a542e22b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c32a659 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild