$ git clone -n https://src.fedoraproject.org/rpms/lilypond.git /var/lib/mock/f45-build-17377-498/root/chroot_tmpdir/scmroot/lilypond
Cloning into '/var/lib/mock/f45-build-17377-498/root/chroot_tmpdir/scmroot/lilypond'...
$ git fetch origin cbe07101031830b6659eb8ebfe46d4d704b83fe4:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/lilypond
 * [new ref]         cbe07101031830b6659eb8ebfe46d4d704b83fe4 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at cbe0710 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild