$ git clone -n https://src.fedoraproject.org/rpms/google-authenticator.git /var/lib/mock/f45-build-12876-444/root/chroot_tmpdir/scmroot/google-authenticator
Cloning into '/var/lib/mock/f45-build-12876-444/root/chroot_tmpdir/scmroot/google-authenticator'...
$ git fetch origin 08274bbb6f428f0ddfc617c22777d7c407e8e553:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/google-authenticator
 * [new ref]         08274bbb6f428f0ddfc617c22777d7c407e8e553 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 08274bb Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild