$ git clone -n https://src.fedoraproject.org/rpms/libsexy.git /var/lib/mock/f41-build-1029085-18372/root/chroot_tmpdir/scmroot/libsexy
Cloning into '/var/lib/mock/f41-build-1029085-18372/root/chroot_tmpdir/scmroot/libsexy'...
$ git fetch origin 423409f785622ade128f1e2dda22e7a71137fa6b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libsexy
 * [new ref]         423409f785622ade128f1e2dda22e7a71137fa6b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 423409f Eliminate use of obsolete %patchN syntax (#2283636)