$ git clone -n https://src.fedoraproject.org/rpms/pygsl.git /var/lib/mock/f42-build-3339469-41426/root/chroot_tmpdir/scmroot/pygsl
Cloning into '/var/lib/mock/f42-build-3339469-41426/root/chroot_tmpdir/scmroot/pygsl'...
$ git fetch origin 830aa9ce709b1017fee020537075494a79d92602:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/pygsl
 * [new ref]         830aa9ce709b1017fee020537075494a79d92602 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 830aa9c Rebuild with gsl 2.8