$ git clone -n https://src.fedoraproject.org/rpms/rust-permutohedron.git /var/lib/mock/f45-build-43791-805/root/chroot_tmpdir/scmroot/rust-permutohedron
Cloning into '/var/lib/mock/f45-build-43791-805/root/chroot_tmpdir/scmroot/rust-permutohedron'...
$ git fetch origin 5d713b28861fcebbd78b4976b2f7ec9e6fa7372b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-permutohedron
 * [new ref]         5d713b28861fcebbd78b4976b2f7ec9e6fa7372b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5d713b2 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild