$ git clone -n https://src.fedoraproject.org/rpms/zynaddsubfx.git /var/lib/mock/f38-build-721732-98613/root/chroot_tmpdir/scmroot/zynaddsubfx
Cloning into '/var/lib/mock/f38-build-721732-98613/root/chroot_tmpdir/scmroot/zynaddsubfx'...
$ git fetch origin bce8a97c501913335d7f0c9103688b609442f5b1:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/zynaddsubfx
 * [new ref]         bce8a97c501913335d7f0c9103688b609442f5b1 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at bce8a97 Update to 3.0.6