$ git clone -n https://src.fedoraproject.org/rpms/rubygem-shindo.git /var/lib/mock/f41-build-746421-13355/root/chroot_tmpdir/scmroot/rubygem-shindo
Cloning into '/var/lib/mock/f41-build-746421-13355/root/chroot_tmpdir/scmroot/rubygem-shindo'...
$ git fetch origin 102f0d262c738d2db7f8022c561837e802bb1124:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rubygem-shindo
 * [new ref]         102f0d262c738d2db7f8022c561837e802bb1124 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 102f0d2 Eliminate use of obsolete %patchN syntax (#2283636)