$ git clone -n https://src.fedoraproject.org/rpms/pygrib.git /var/lib/mock/f39-build-1782398-41558/root/chroot_tmpdir/scmroot/pygrib
Cloning into '/var/lib/mock/f39-build-1782398-41558/root/chroot_tmpdir/scmroot/pygrib'...
$ git fetch origin f10d9019afff75c808691e4393505b59e59eb0e1:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/pygrib
 * [new ref]         f10d9019afff75c808691e4393505b59e59eb0e1 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f10d901 upgrade to version 2.1.5