$ git clone -n https://src.fedoraproject.org/rpms/rust-below-store.git /var/lib/mock/f40-build-1883041-25042/root/chroot_tmpdir/scmroot/rust-below-store
Cloning into '/var/lib/mock/f40-build-1883041-25042/root/chroot_tmpdir/scmroot/rust-below-store'...
$ git fetch origin 91d7287a8e9aa33d6bd98d4472172883adae09c8:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-below-store
 * [new ref]         91d7287a8e9aa33d6bd98d4472172883adae09c8 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 91d7287 Update to 0.8.1 (rhbz#2272253)