$ git clone -n https://src.fedoraproject.org/rpms/perl-Math-ConvexHull-MonotoneChain.git /var/lib/mock/f45-build-24680-605/root/chroot_tmpdir/scmroot/perl-Math-ConvexHull-MonotoneChain
Cloning into '/var/lib/mock/f45-build-24680-605/root/chroot_tmpdir/scmroot/perl-Math-ConvexHull-MonotoneChain'...
$ git fetch origin 3bcab3e80329d15036be0cf91550de9e9e13712e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Math-ConvexHull-MonotoneChain
 * [new ref]         3bcab3e80329d15036be0cf91550de9e9e13712e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3bcab3e Perl 5.44 rebuild