$ git clone -n https://src.fedoraproject.org/rpms/python-mistune.git /var/lib/mock/f41-build-side-1-2814657-32949/root/chroot_tmpdir/scmroot/python-mistune
Cloning into '/var/lib/mock/f41-build-side-1-2814657-32949/root/chroot_tmpdir/scmroot/python-mistune'...
$ git fetch origin 75c865503abbfe3da1065198c5a87d702b50ae60:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-mistune
 * [new ref]         75c865503abbfe3da1065198c5a87d702b50ae60 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 75c8655 Update to 3.0.2