$ git clone -n https://src.fedoraproject.org/rpms/perl-File-Pid.git /var/lib/mock/f41-build-1099068-20020/root/chroot_tmpdir/scmroot/perl-File-Pid
Cloning into '/var/lib/mock/f41-build-1099068-20020/root/chroot_tmpdir/scmroot/perl-File-Pid'...
$ git fetch origin 7995fbc99a307671d6697980a057920313e97c2d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-File-Pid
 * [new ref]         7995fbc99a307671d6697980a057920313e97c2d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7995fbc Eliminate use of obsolete %patchN syntax (#2283636)