$ git clone -n https://src.fedoraproject.org/rpms/taglib-extras.git /var/lib/mock/f41-build-1041884-18994/root/chroot_tmpdir/scmroot/taglib-extras
Cloning into '/var/lib/mock/f41-build-1041884-18994/root/chroot_tmpdir/scmroot/taglib-extras'...
$ git fetch origin 21dffe28de3e40e5c780fe1f2413582953a4a4f8:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/taglib-extras
 * [new ref]         21dffe28de3e40e5c780fe1f2413582953a4a4f8 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 21dffe2 Eliminate use of obsolete %patchN syntax (#2283636)