$ git clone -n https://src.fedoraproject.org/rpms/perl-CGI-SpeedyCGI.git /var/lib/mock/f40-build-797679-141429/root/chroot_tmpdir/scmroot/perl-CGI-SpeedyCGI
Cloning into '/var/lib/mock/f40-build-797679-141429/root/chroot_tmpdir/scmroot/perl-CGI-SpeedyCGI'...
$ git fetch origin f34b7dcc2ca6b68c1160284304a493e2524e8378:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-CGI-SpeedyCGI
 * [new ref]         f34b7dcc2ca6b68c1160284304a493e2524e8378 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f34b7dc Add -Wno-incompatible-pointer-types to CFLAGS (#2259171)