$ git clone -n https://src.fedoraproject.org/rpms/python-multihash.git /var/lib/mock/f45-build-31596-654/root/chroot_tmpdir/scmroot/python-multihash
Cloning into '/var/lib/mock/f45-build-31596-654/root/chroot_tmpdir/scmroot/python-multihash'...
$ git fetch origin 0f2fd1c347186e15dea92fa03f1c8e06e3103e4a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-multihash
 * [new ref]         0f2fd1c347186e15dea92fa03f1c8e06e3103e4a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0f2fd1c Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild