$ git clone -n https://src.fedoraproject.org/rpms/perl-NNTPClient.git /var/lib/mock/f41-build-1287150-23295/root/chroot_tmpdir/scmroot/perl-NNTPClient
Cloning into '/var/lib/mock/f41-build-1287150-23295/root/chroot_tmpdir/scmroot/perl-NNTPClient'...
$ git fetch origin 1eee9bb8310df968e39ab9be789df8add74b4a5b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-NNTPClient
 * [new ref]         1eee9bb8310df968e39ab9be789df8add74b4a5b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1eee9bb Eliminate use of obsolete %patchN syntax (#2283636)