$ git clone -n https://src.fedoraproject.org/rpms/pbuilder.git /var/lib/mock/f41-build-side-1-3128529-39567/root/chroot_tmpdir/scmroot/pbuilder
Cloning into '/var/lib/mock/f41-build-side-1-3128529-39567/root/chroot_tmpdir/scmroot/pbuilder'...
$ git fetch origin 5458e69753d3d9fd70726db8adab259d1ee2d379:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/pbuilder
 * [new ref]         5458e69753d3d9fd70726db8adab259d1ee2d379 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5458e69 Update pbuilder to 0.231.1 (#2310546)