$ git clone -n https://src.fedoraproject.org/rpms/tcpxtract.git /var/lib/mock/f41-build-1041923-18994/root/chroot_tmpdir/scmroot/tcpxtract
Cloning into '/var/lib/mock/f41-build-1041923-18994/root/chroot_tmpdir/scmroot/tcpxtract'...
$ git fetch origin 6f84166a51a23c9bec936465bfd72d1bf9d36d43:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/tcpxtract
 * [new ref]         6f84166a51a23c9bec936465bfd72d1bf9d36d43 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6f84166 Eliminate use of obsolete %patchN syntax (#2283636)