$ git clone -n https://src.fedoraproject.org/rpms/perl-Test-Script-Run.git /var/lib/mock/f41-build-1211692-22574/root/chroot_tmpdir/scmroot/perl-Test-Script-Run
Cloning into '/var/lib/mock/f41-build-1211692-22574/root/chroot_tmpdir/scmroot/perl-Test-Script-Run'...
$ git fetch origin 1738aed8cb1f19e91b5c887c72e3b377b5a9fec3:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Test-Script-Run
 * [new ref]         1738aed8cb1f19e91b5c887c72e3b377b5a9fec3 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1738aed Eliminate use of obsolete %patchN syntax (#2283636)