$ git clone -n https://src.fedoraproject.org/rpms/lilypond.git /var/lib/mock/f41-build-858118-168313/root/chroot_tmpdir/scmroot/lilypond
Cloning into '/var/lib/mock/f41-build-858118-168313/root/chroot_tmpdir/scmroot/lilypond'...
$ git fetch origin d7928711b8c0dbec058741bcdb46bb93a2dda233:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/lilypond
 * [new ref]         d7928711b8c0dbec058741bcdb46bb93a2dda233 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d792871 2.25.20