$ git clone -n https://src.fedoraproject.org/rpms/snotes.git /var/lib/mock/f45-build-36188-702/root/chroot_tmpdir/scmroot/snotes
Cloning into '/var/lib/mock/f45-build-36188-702/root/chroot_tmpdir/scmroot/snotes'...
$ git fetch origin 81a88ce79788f75ab7bff6ff0d35a81791d581d2:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/snotes
 * [new ref]         81a88ce79788f75ab7bff6ff0d35a81791d581d2 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 81a88ce Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild