$ git clone -n https://src.fedoraproject.org/rpms/perl-Boost-Geometry-Utils.git /var/lib/mock/f45-build-21886-588/root/chroot_tmpdir/scmroot/perl-Boost-Geometry-Utils
Cloning into '/var/lib/mock/f45-build-21886-588/root/chroot_tmpdir/scmroot/perl-Boost-Geometry-Utils'...
$ git fetch origin 770812f2266c1e1417d9d752992971be1648bd75:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Boost-Geometry-Utils
 * [new ref]         770812f2266c1e1417d9d752992971be1648bd75 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 770812f Perl 5.44 rebuild