$ git clone -n https://src.fedoraproject.org/rpms/python-msgpack.git /var/lib/mock/f40-build-2203755-51938/root/chroot_tmpdir/scmroot/python-msgpack
Cloning into '/var/lib/mock/f40-build-2203755-51938/root/chroot_tmpdir/scmroot/python-msgpack'...
$ git fetch origin f2f49f0ad9a68b7e2f86493a9c2170833da30394:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-msgpack
 * [new ref]         f2f49f0ad9a68b7e2f86493a9c2170833da30394 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f2f49f0 Fix changelog entries