$ git clone -n https://src.fedoraproject.org/rpms/python-stomper.git /var/lib/mock/f40-build-2223487-52743/root/chroot_tmpdir/scmroot/python-stomper
Cloning into '/var/lib/mock/f40-build-2223487-52743/root/chroot_tmpdir/scmroot/python-stomper'...
$ git fetch origin 4dd17b17bf061a7c21b6460035c4fb22cde8a20e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-stomper
 * [new ref]         4dd17b17bf061a7c21b6460035c4fb22cde8a20e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4dd17b1 Drop dependency on python3-future