$ git clone -n https://src.fedoraproject.org/rpms/perl-Sys-Statistics-Linux.git /var/lib/mock/f41-build-1146594-21197/root/chroot_tmpdir/scmroot/perl-Sys-Statistics-Linux
Cloning into '/var/lib/mock/f41-build-1146594-21197/root/chroot_tmpdir/scmroot/perl-Sys-Statistics-Linux'...
$ git fetch origin 1973335d160cd261f506fe4f595b1c6bd83a57e3:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Sys-Statistics-Linux
 * [new ref]         1973335d160cd261f506fe4f595b1c6bd83a57e3 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1973335 Eliminate use of obsolete %patchN syntax (#2283636)