$ git clone -n https://src.fedoraproject.org/rpms/perl-PerlIO-via-dynamic.git /var/lib/mock/f41-build-1287238-23295/root/chroot_tmpdir/scmroot/perl-PerlIO-via-dynamic
Cloning into '/var/lib/mock/f41-build-1287238-23295/root/chroot_tmpdir/scmroot/perl-PerlIO-via-dynamic'...
$ git fetch origin 16ff677d1152c2f4ce334b3093b5fa8d0f8002ee:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-PerlIO-via-dynamic
 * [new ref]         16ff677d1152c2f4ce334b3093b5fa8d0f8002ee -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 16ff677 Eliminate use of obsolete %patchN syntax (#2283636)