$ git clone -n https://src.fedoraproject.org/rpms/pygsl.git /var/lib/mock/f40-build-1966323-25208/root/chroot_tmpdir/scmroot/pygsl
Cloning into '/var/lib/mock/f40-build-1966323-25208/root/chroot_tmpdir/scmroot/pygsl'...
$ git fetch origin eaa66bf827e5fe2b88504f2e2d1218afcb7a9d4f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/pygsl
 * [new ref]         eaa66bf827e5fe2b88504f2e2d1218afcb7a9d4f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at eaa66bf Update the spec file to more modern Python guidelines